Clinical-epidemiological characterization of human anal papilloma virus infection coloproctology unit: Central University Hospital Dr. "Antonio Maria Pineda"

Human papillomavirus (HPV) infection is one of the most common sexually transmitted viral diseases. A descriptive cross-sectional study was conducted with the purpose of clinically and epidemiologically characterizing anal HPV infection in patients who attended the Benign Orificial Pathology Consultation of the Coloproctological Unit at the Dr. "Antonio María Pineda" Central University Hospital, during the period March 2022 -February 2023, by selecting 288 patients whose average age was 47.09 ± 14.61 years, being the 41-50 years old group (29.17%) and the 51-60 years old group (19.44%) the most affected groups by pathologies of the anal region, with a predominance of male (54.17%). The sociodemographic characteristics with the highest frequency included married (48.61%) and single (47.22%); secondary level of education (44.44%) and traders (18.05%) and housewives (15, 28%) as predominant occupations. The risk factors were represented by onset of sexual intercourse between 16-20 years of age (65.28%), heterosexuality (91.67%), 22.22% reported having anal sex and 5.56% oral sex. Likewise, 5.56% were reported with a history of genital HPV and 4.17% were HIV positive. In addition, 48.61% stated not to use condoms. The initial clinical diagnosis included hemorrhoidal disease (30.55%), anal fistula (25%) and anal fissure (18.05%), and one patient (1.39%) with anal HPV infection. Anal cytology results showed 8.33% flat epithelial cells with cytopathic changes suggestive of HPV infection and 1.39% squamous cells with cytopathic changes suggestive of HPV infection: 50% mild inflammatory negative for malignancy and 33.33% flat epithelial cells without atypia. In conclusion, the anal cytology investigation should continue to determine the actual frequency of anal HPV infection. (AU)

Identification and reporting of anal pathology during routine colonoscopies

The gold-standard procedure for anal canal examination is anoscopy. Nonetheless, patients are referred for a colonoscopy for many reasons, and a routine exam might provide an opportunity to diagnose anal pathologies, such as hemorrhoids, anal fissures, anal polyps, condylomas, and anal squamous cell carcinoma. It is important to know the main features of these conditions and relevant information to report in order to help guide patient treatment and follow-up.

Meta-analysis comparing long-term outcomes of intersphincteric resection versus abdominoperineal resection for low rectal cancer / 中华胃肠外科杂志

Objective: To compare the long-term outcomes of intersphincteric (trans-internal and external) sphincter resection (ISR) and abdominoperineal proctocolectomy (APR) for low-grade rectal cancer. Methods: We used a meta-analytic approach to compare these procedures . Published reports comparing ISR and APR for low rectal cancer in Pubmed, Medline, EMBASE and Cochrane, China Knowledge Network (CNKI), China Biomedical Literature Database, and Vipers databases between January 2005 and January 2023 were searched and those meeting the eligibility criteria were selected for extraction of data for analysis. Inclusion criteria were as follows: (1) all reports comparing ISR and APR for low rectal cancer before January 2023; and (2) prospective randomized controlled studies or well-designed cohort studies. Exclusion criteria were as follows: (1) full text not available; (2) duplicate publications, missing primary outcome indicators, and unknown data; and (3) invalid statistical analysis. Results: Sixteen studies with 2498 patients were included in this study. Compared with the APR group, patients in the ISR group were relatively younger (weighted mean difference [WMD]=-1.82, 95%CI=-2.94 to -0.70, P=0.01), had tumors farther from the anal verge (WMD=0.43, 95%CI=0.18 to 0.67, P<0.01), and lower pathological T-stage (T3-4 stage: OR=0.54, 95%CI=0.36 to 0.81, P<0.01). In contrast, there were no statistically significant differences between the two groups in gender (P=0.78), body mass index (P=0.77), or pathological N stage (P=0.09). Compared with the APR group, patients in the ISR group had a lower rate of postoperative complications (OR=0.77, 95%CI=0.60 to 0.99, P=0.04), shorter hospital stay (WMD=-4.30, 95%CI=-7.07 to -1.53, P<0.01), higher 5-year overall survival (HR=0.54, 95%CI=0.33 to 0.88, P=0.01), and higher 5-year disease-free survival (HR=0.65, 95%CI=0.47 to 0.90, P<0.01). Five-year locoregional failure (HR=0.66, 95%CI=0.40 to 1.10, P=0.11) and time to surgery (WMD=-9.71, 95%CI=-41.89 to 22.47, P=0.55) did not differ significantly between the two groups. Conclusion: ISR is a safe and effective alternative to APR for early-stage low-grade rectal cancer.

Clinical application and standardized implementation of intersphincteric resection / 中华胃肠外科杂志

Intersphincteric resection (ISR) is the ultimate sphincter-preserving surgical technique for low rectal cancer. To promote the standardized implementation of ISR, this review discusses the important issues regarding the clinical application of ISR with reference to the latest Chinese expert consensus on ISR. In terms of ISR-related pelvic anatomy of the rectum/anal canal, hiatal ligament is not identical with the anococcygeal ligament. At the level where the rectourethralis muscle continuously extends to the posteroinferior area of the membranous urethra from the rectum, the neurovascular bundle is identified between the posterior edge of rectourethralis muscle and the anterior edge of the longitudinal muscle of the rectum. This knowledge is crucial to detect the anterior dissection plane during ISR at the levator hiatus level. The indication criteria for ISR included: (1) stage I early low rectal cancer; (2) stage II-III low rectal cancer undergoing neoadjuvant treatment, and supra-anal tumors and juxta-anal tumors of stage ycT3NxM0, or intra-anal tumors of stage ycT2NxM0. However, signet ring cell carcinoma, mucinous adenocarcinoma and undifferentiated carcinoma should be contraindicated to ISR. For locally advanced low rectal cancer (especially anteriorly located tumor), neoadjuvant treatment should be carried out in a standardized manner. However, it should be recognized that neoadjuvant chemoradiotherapy was a risk factor for poor anal function after ISR. For surgical approaches for ISR, including transanal, transabdominal, and transanal transabdominal approaches, the choice should be based on oncological safety and functional consequences. While ensuring the negative margin, maximal preservation of rectal walls and anal canal contributs to better postoperative anorectal function. Careful attention must be paid to complications regarding ISR, with special focus on the anastomotic complications. The incidence of low anterior resection syndrome (LARS) was higher than 40%. However, this issue is often neglected by clinicians. Thus, management and rehabilitation strategies for LARS with longer follow-ups were required.

Cross-sectional study of low anterior resection syndrome in patients who have survived more than 5 years after sphincter-preserving surgery for rectal cancer / 中华胃肠外科杂志

Objective: In this study, we aimed to investigate the prevalence of low anterior resection syndrome (LARS) in patients who had survived for more than 5 years after sphincter-preserving surgery for rectal cancer and to analyze its relationship with postoperative time. Methods: This was a single-center, retrospective, cross-sectional study. The study cohort comprised patients who had survived for at least 5 years (60 months) after undergoing sphincter- preserving radical resection of pathologically diagnosed rectal adenocarcinoma within 15 cm of the anal verge in the Department of Gastrointestinal Surgery, Peking University People's Hospital from January 2005 to May 2016. Patients who had undergone local resection, had permanent stomas, recurrent intestinal infection, local recurrence, history of previous anorectal surgery, or long- term preoperative defecation disorders were excluded. A LARS questionnaire was administered by telephone interview, points being allocated for incontinence for flatus (0-7 points), incontinence for liquid stools (0-3 points), frequency of bowel movements (0-5 points), clustering of stools (0-11 points), and urgency (0-16 points). The patients were allocated to three groups based on these scores: no LARS (0-20 points), minor LARS (21-29 points), and major LARS (30-42 points). The prevalence of LARS and major LARS in patients who had survived more than 5 years after surgery, correlation between postoperative time and LARS score, and whether postoperative time was a risk factor for major LARS and LARS symptoms were analyzed. Results: The median follow-up time of the 160 patients who completed the telephone interview was 97 (60-193) months; 81 (50.6%) of them had LARS, comprising 34 (21.3%) with minor LARS and 47 (29.4%) with major LARS. Spearman correlation analysis showed no significant correlation between LARS score and postoperative time (correlation coefficient α=-0.016, P=0.832). Multivariate analysis identified anastomotic height (RR=0.850, P=0.022) and radiotherapy (RR=5.760, P<0.001) as independent risk factors for major LARS; whereas the postoperative time was not a significant risk factor (RR=1.003, P=0.598). The postoperative time was also not associated with LARS score rank and frequency of bowel movements, clustering, or urgency (P>0.05). However, the rates of incontinence for flatus (3/31, P=0.003) and incontinence for liquid stools (8/31, P=0.005) were lower in patients who had survived more than 10 years after surgery. Conclusions: Patients with rectal cancer who have survived more than 5 years after sphincter-preserving surgery still have a high prevalence of LARS. We found no evidence of major LARS symptoms resolving over time.

Lipoma de recto prolapsado e incarcerado: caso clínico y análisis de la literatura / Prolapsed and incarcerated rectal lipoma: case report and literature review / Prolapso e encarceramento de lipoma do reto: caso clínico e análise da literatura

Los lipomas colónicos son tumores benignos poco frecuentes, extremadamente raros a nivel rectal. A pesar de ello, ocupan el segundo lugar en frecuencia detrás de los pólipos adenomatosos. Aunque la mayoría de los lipomas colorrectales son asintomáticos y se descubren incidentalmente, en ocasiones pueden ser sintomáticos y determinar complicaciones agudas que requieren tratamiento quirúrgico de urgencia. Estas formas de presentación pueden confundirse con las del cáncer colorrectal, constituyendo un desafío diagnóstico y terapéutico. Presentamos el caso de una paciente que consultó en emergencia por una gran masa dolorosa de aparición aguda a nivel del ano, resultando ser un lipoma rectal prolapsado a través del canal anal.

Colonic lipomas are infrequent benign tumors, extremely rare at the rectum. Nevertheless, they follow in frequency polyp adenomas. Even though most colorectal lipomas are asymptomatic and incidental, they can occasionally be symptomatic and develop acute complications that require urgent surgical treatment. This form of presentation can be confounded with colorectal cancer, therefore impairing diagnosis and treatment. We present the case of a female patient who came to the emergency room with an acute painful mass through the anus, that resulted in a prolapsed rectal lipoma.

Os lipomas colônicos são tumores benignos pouco frequentes, extremamente raros no nível retal. Apesar disso, ocupam o segundo lugar em frequência atrás dos pólipos adenomatosos. Embora a maioria dos lipomas colorretais sejam assintomáticos e descobertos incidentalmente, às vezes eles podem ser sintomáticos e levar a complicações agudas que requerem tratamento cirúrgico de emergência. Essas formas de apresentação podem ser confundidas com as do câncer colorretal, constituindo um desafio diagnóstico e terapêutico. Apresentamos o caso de um paciente que consultou na sala de emergência por uma grande massa dolorosa de início agudo ao nível do ânus, que acabou por ser um lipoma retal prolapsado pelo canal anal.

Adenocarcinoma mucinoso del canal anal: caso clínico y cómo evitar el error en su diagnóstico / Mucinous adenocarcinoma of the anal canal: clinical case and how to avoid errors in its diagnosis / Adenocarcinoma mucinoso do canal anal: caso clínico e como evitar erros no seu diagnóstico

El manejo del adenocarcinoma de recto se ha visto revolucionado por la cirugía mesorectal y la neoadyuvancia al igual que el cáncer epidermoide de ano con el protocolo de Nigro. Sin embargo, los adenocarcinomas de ano constituyen una patología infrecuente, relacionada con procesos inflamatorios crónicos como las fístulas perianales y cuyo tratamiento genera controversias. El desconocimiento de sus características clínicas e imagenológicas puede generar una confusión diagnóstica principalmente con un absceso perianal. Presentamos el caso clínico de un adenocarcinoma de canal anal en relación a una fístula perianal crónica y una revisión de la literatura actual sobre el tema.

The mesorectal surgery and the neoadyuvant treatment have changed the management of rectal adenocarcinoma. The Nigro protocol had the same impact on the squamous cell cancer of the anus. However, the adenocarcinoma of the anus is an infrequent pathology, related to chronic inflammatory processes such as perianal fistulas and its treatment generates controversy. The lack of knowledge about clinical and imaging characteristics of this pathology can lead to diagnostic confusion, mainly with a perianal abscess. We hereby present the clinical case of an anal canal adenocarcinoma in relation to a chronic perianal fistula and a review of the current literature on the subject.

O manejo do adenocarcinoma retal foi revolucionado pela cirurgia mesorretal e pelo tratamento neoadjuvante, assim como o câncer de células escamosas do ânus com o protocolo Nigro. Entretanto, os adenocarcinomas do ânus são uma patologia pouco frequente, relacionada a processos inflamatórios crônicos como as fístulas perianais e cujo tratamento gera controvérsias. O desconhecimento de suas características clínicas e de imagem pode levar a uma confusão diagnóstica, principalmente com o abscesso perianal. Apresentamos o caso clínico de um adenocarcinoma do canal anal relacionado a uma fístula perianal crônica e uma revisão da literatura atual sobre o assunto.

SMILE-like lesion in the anal canal

Stratified mucin-producing intraepithelial lesion (SMILE) is an intraepithelial lesion with overlapping features of the high-grade squamous intraepithelial lesion (HSIL) and adenocarcinoma in situ (AIS). Currently, it is well described in the cervix. We present a case showing similar SMILE-like lesions in the polypectomy specimen from the anal canal along with invasive adenocarcinoma components. This lesion showed an immuno-profile characteristic of a SMILE lesion described in the cervix, such as p63 negativity, high ki67 index, and nuclear positivity for p16. It might be arising from the Human papillomavirus prone transitional region of the anal canal as described in the cervix. However, we could not assure this association and etiological link due to insufficient material in the formalin-fixed paraffin-embedded block. Notwithstanding, we strongly suggest that the HPV is the main driver for this SMILE-like lesion similar to what is described in the cervix. To our knowledge, this is the first case report of a SMILE lesion in the anal canal. Further studies will be required to elucidate the underlying pathogenetic mechanism of SMILE-like lesions described in the anal canal.

Tumores ano-rectales del músculo liso / Smooth muscle ano-rectal tumors

Introducción: Los tumores ano-rectales del musculo liso son raros, la relación respecto de los de recto es de 0.1%, presentándose con un rango entre 40-70 años. El objetivo es analizar una serie de pacientes, el tratamiento empleado y actualización bibliográfica. Material y Método: Sobre una base de datos retrospectiva entre enero de 1983 y diciembre de 2018, sobre 421 pacientes operados por cáncer recto-anal, fueron extraídos 6 que correspondieron a tumores del musculo liso. Resultados: Correspondieron al sexo femenino 4, con edades entre 49 y 75 años (57.5 años); 4 de localización rectal, de ellos 3 fueron leiomiosarcoma, y 2 anales (leiomioma). En 2 se obtuvo diagnostico preoperatorio de certeza por punción mediante Tru-Cut. De 3 pacientes con leiomiosarcoma, a 2 se les realizo cirugía radical y al restante biopsia. Los 2 resecados recidivaron a los 6 meses y al año. Los 3 fallecieron entre los 2 y 16 meses por progresión de la enfermedad. La paciente con diagnóstico de leiomioma rectal, operada mediante cirugía radical, se encuentra sin recidiva a 18 meses. Los 2 pacientes resecados localmente por leiomioma de ano, presentaron en el postoperatorio absceso y fistula extraesfinteriana, uno de ellos con incontinencia severa. Ambos fueron re-operados y se encuentran asintomáticos, libres de recidiva a los 36 y 60 meses. Discusión: Los tumores del músculo liso ano-rectal son infrecuentes y presentan síntomas inespecíficos. La biopsia preoperatoria es imperiosa a fin de establecer una adecuada estrategia quirúrgica. Los malignos tienen alto índice de recidiva y mortalidad. (AU)

Introduction: Smooth muscle ano-rectal tumors are rare; the relation with respect to the rectum is 0.1%, in a patient's age range between 40-70 years. The objective is the analysis of a series of patients, the treatment used and bibliographic update. Material and method: On a retrospective, database between January 1983 and December 2018. About 421 patients operated for rectum-anal cancer, of which 6 corresponded to smooth muscle tumors. Results: Four were female, with ages between 49 and 75 years (57.5 years average); 4 were of rectal location, of which 3 were leiomyosarcoma, and 2 anal (leiomyoma). In two, a preoperative diagnosis of certainty was obtained by Tru-Cut. Two out of 3 patients with leiomyosarcoma, underwent radical surgery and the remaining one a biopsy. The two resected relapsed at 6 months and at one year. All 3 died between 2 and 16 months due to disease progression. The patient diagnosed with rectal leiomyoma, operated by radical surgery, is without recurrence at 18 months. The 2 patients resected locally for anus leiomyoma showed abscess and extrasphincteric fistula in the postoperative period, one of them with severe incontinence. Both were re-operated and are asymptomatic, free of recurrence at 36 and 60 months. Discussion: Ano-rectal smooth muscle tumors are uncommon and have nonspecific symptoms. Preoperative biopsy is imperative in order to establish an appropriate surgical strategy. Malignant tumors have a high rate of recurrence and mortality. (AU)

Manifestaciones clínicas y anoscópicas de las lesiones ecamosas intraepiteliales de alto grado anales / Clinical and anoscopic manifestations of high-grade anal squamous intraepithelial lesions

Introducción: Las lesiones escamosas intraepiteliales de alto grado anales (H-ASIL) son consideradas el precursor del carcinoma escamoso anal. Es por esto que distintas Sociedades recomiendan su pesquisa y tratamiento en poblaciones de alto riesgo. El objetivo del trabajo es describir las manifestaciones de H-ASIL en la anoscopía de alta resolución (AAR) en nuestros pacientes. Diseño: Retrospectivo, descriptivo. Pacientes y métodos: Revisión de historias clínicas e imágenes de AAR de pacientes con diagnóstico de H-ASIL entre enero de 2016 y julio de 2017. La evaluación anoscópica incluyó la unión escamocolumnar, el conducto anal distal y el área perianal. Frente al hallazgo de una lesión sospechosa de ASIL, se tomaron biopsias. Resultados: Entre enero de 2016 y julio de 2017 se realizaron 184 AAR. Se biopsiaron 143 lesiones sospechosas de ASIL. Veintiséis de ellas, presentes en 13 pacientes fueron H-ASIL. Once hombres (diez hombres que tienen sexo con hombre (HSH) con infección por VIH). Todas las lesiones eran subclínicas y se encontraron a nivel endoanal; eran en su totalidad acetoblancas. Se buscaron áreas con puntillado y/o mosaico sugestivas de ASIL. El uso de Lugol nos permitió aumentar el grado de sospecha y delimitar las lesiones. Se tomaron biopsias para anatomía patológica bajo visión directa. Conclusiones: Las H-ASIL son consideradas en la actualidad las precursoras del carcinoma escamoso anal; su detección y tratamiento prevendrían su desarrollo. En nuestra casuística, todos los pacientes se encontraban en al menos un grupo de riesgo. Las lesiones fueron subclínicas y requirieron de la anoscopía de alta resolución para su hallazgo, lo que permitió realizar un tratamiento dirigido. Es importante que los profesionales de la salud consideren la pesquisa de H-ASIL en población de riesgo. (AU)

Introduction: The high-grade anal intraepithelial lesions (H-ASIL) are considered the precursor of the anal squamous cell carcinoma. This is why different societies recommend the screening and treatment in high-risk populations. The objective of this paper is to describe H-ASIL manifestations in the high resolution anoscopy (HRA) in our patients. Design: Retrospective, Descriptive Patients and Methods: Review of clinical histories and pictures of HRA of patients with H-ASIL diagnosis between January 2016 and July 2017. The anoscopic evaluation included the squamocolumnar junction, the distal anal duct and the perianal area. In case of the finding of a suspicious lesion of ASIL, biopsies were taken. Results: Between January 2016 and July 2017 184 HRA were performed. 143 ASIL suspicious lesion were biopsied. Twentysix of them, in 13 patients, were H-ASIL. Eleven were men (10 men who have sex with men with HIV infection). All lesions were subclinical and found at endoanal level. The totality of them were acetowhite. Areas with coarse punctation and a mosaic pattern were suggestive of ASIL. The use of lugol´s iodine allows us to increase the grade of suspect and delimit the lesions. Biopsies were taken for pathology under direct vision. Conclusion: The H-ASIL are considered at the present the precursors of the anal squamous carcinoma. Its development could be prevented with de proper detection and treatment of the H-ASIL. In our casuistic, all patients are in at least one risk group. The lesions were subclinical and required of the high resolution anoscopy for their finding, which allows to perform a directed treatment. It is important that health professionals consider the H-ASIL screening in risk population. (AU)

Tumor de Ackerman perianal / Ackerman's perianal tumor

Introducción: El carcinoma verrucoso o tumor de Ackerman es una rara entidad relacionada con la infección por el virus del papiloma humano, comportándose como una variante menos agresiva del carcinoma epidermoide. Caso clínico: Presentamos el caso clínico de un paciente de sexo masculino de 45 años portador de una gran lesión perianal con compromiso del canal anal y el aparato esfinteriano. Discusión: Existen varias alternativas para el tratamiento del tumor de Ackerman. Sin embargo en casos como este, y sobre todo ante la ausencia de respuesta al tratamiento de quimioradioterapia, se requiere de una resección amplia y radical. Pese a ello, la recidiva es frecuente. Conclusiones: En el caso analizado se destaca la forma particularmente agresiva de esta patología, con extensa invasión local y pobre respuesta al tratamiento oncoespecífico inicial.

Introduction: Verrucous carcinoma or Ackerman's tumor is a rare entity related to human papillomavirus infection, behaving as a less aggressive variant of squamous cell carcinoma. Clinical case: We present the case of a 45-year-old male patient with a large perianal lesion with involvement of the anal canal and sphincter. Discussion: Ackerman tumor treatment admits different therapeutic modalities; however, in cases such as this, and especially in the absence of response to chemo-radiotherapy treatment, a broad and radical resection is required. Despite this, recurrence is frequent. Conclusions: The particularly aggressive form of this pathology, with extensive local invasion and poor response to the initial oncoespecific treatment, stands out in the analyzed case

Excisão total de mesorreto transanal combinada à dissecção laparoscópica: resultados perioperatórios e avaliação da qualidade do mesorreto / Transanal total mesorectal excision combined with laparoscopic dissection: perioperative results and assessment of the mesorectal quality

RESUMO Objetivo: avaliar os resultados perioperatórios e pós-operatórios relacionados à excisão total do mesorreto transanal, bem como, qualidade dos espécimes obtidos pela excisão total do mesorreto transanal através da análise histopatológica da qualidade do mesorreto, acometimento das margens proximal e distal e positividade da margem circunferencial. Métodos: estudo prospectivo, descritivo, em pacientes consecutivos portadores de adenocarcinoma de reto localizados até 10cm da borda anal, sem metástase à distância, submetidos ou não à quimioterapia e radioterapia neoadjuvantes. Foram avaliados a presença de dificuldades técnicas, índice de conversão para via abdominal, tempo cirúrgico e intercorrências intra e pós-operatórias. A qualidade do mesorreto foi classificada em ressecção completa, parcialmente completa ou incompleta. Resultados: entre dezembro de 2016 e maio de 2019, 41 pacientes foram submetidos à excisão total do mesorreto transanal, dos quais 75% foram classificados como estágio clínico III, 13% estágio clínico II e 12% estágio clínico I. A média de distância entre borda anal e borda inferior do tumor foi de 6,2cm. Quarenta por cento dos tumores encontravam-se na parede retal anterior e 17% foram classificados como circunferenciais. A média de tempo operatório foi de 189 minutos. A média de internação hospitalar foi de 4,6 dias. Não houve óbitos intra-hospitalares. Oitenta e dois por cento dos espécimes foram classificados como ressecção completa. Conclusão: a excisão total do mesorreto transanal demonstra adequada qualidade do mesorreto e adequadas margens cirúrgicas, estando associada a baixos índices de complicações perioperatórias, tempo cirúrgico aceitável e curto tempo de hospitalização.

ABSTRACT Objective: to assess the perioperative and postoperative results of transanal total mesorectal excision, as well as the quality of the specimens obtained by this technique. Methods: we conducted a prospective, descriptive study in consecutive patients with rectal adenocarcinoma located up to 10cm from the anal verge, without distant metastasis, subjected or not to neoadjuvant chemoradiotherapy. We evaluated the presence of technical difficulties, conversion to open abdominal route, surgical time and intra and postoperative complications. Through histopathological analysis, we assessed the quality of the mesorectum, involvement of the proximal and distal margins and positivity of the circumferential, classifying quality of the mesorectum as complete, partially complete or incomplete resection. Results: between December 2016 and May 2019, 41 patients underwent transanal total mesorectal excision, of which 75% were classified as clinical stage III, 13% clinical stage II and 12% clinical stage I. The average distance between the anal verge and the lower border of the tumor was 6.2cm. Forty percent of the tumors were in the anterior rectal wall and 17% were circumferential. The average operative time was 189 minutes. The average hospital stay was 4.6 days. There were no in-hospital deaths. Eighty-two percent of the specimens were classified as complete resection. Conclusion: transanal total mesorectal excision demonstrates adequate specimen quality and surgical margins, being associated with lower rates of perioperative complications, acceptable surgical time and short hospitalization.

¿Permiten la citología, el genotipado y la anoscopia de alta resolución establecer un protocolo para la detección precoz del carcinoma epidermoide de canal anal en población de riesgo? / Do cytology, genotyping, and high resolution anoscopy allow to establish a protocol for early detection of squamous cell carcinoma of the anal canal in risk population?

Introducción: El cáncer anal ha experimentado un aumento de incidencia en los últimos años. Está mediado por el VPH y precedido de cambios precancerosos planteando la posibilidad de dirigir los esfuerzos preventivos hacia los grupos de alto riesgo. Sigue siendo controvertida la indicación de cribado y los métodos de detección ideales. Objetivo: Validar las pruebas de cribado implementadas en la actualidad comparadas con la biopsia como "gold standard". Material y Métodos: Estudio transversal con recogida de datos prospectiva, en una cohorte de hombres VIH+ que tienen sexo con hombres, pertenecientes al Hospital Gregorio Marañón e Infanta Leonor en un periodo de 2 años. Resultados: Se seleccionaron 179 pacientes con 286 visitas a la consulta de screening en las que se llevaron a cabo 3 pruebas de cribado en paralelo (citología anal, genotipado del VPH y anoscopia de alta resolución (AAR) con toma de biopsia dirigida sobre zona sospechosa o aleatoria). La sensibilidad y especificidad para la detección de displasia de alto grado y cáncer y su grado de concordancia con la biopsia fue la siguiente: citología 3,23%/94,43% (k: 0,03), genotipado de VPH de alto riesgo 90,32%/27,45% (k: 0,05), AAR 32,26%/87,45 (k: 0, 17) siendo el rendimiento diagnóstico de las tres pruebas muy bajo. Conclusión: La citología presenta un rendimiento diagnóstico muy bajo comparado con el genotipado que representa el mayor. A la luz de nuestros resultados, los protocolos clínicos tal y como vienen desarrollándose en la actualidad deberían de ser abandonados.

Introduction: The incidence of anal cancer has increased in recent years. It is mediated by HPV and preceded by precancerous changes, raising the possibility of directing preventive efforts towards high-risk groups. The indication of screening remains controversial and which methods would be the ideal ones. Objective: To validate the screening tests established actually, comparing it with the biopsy considered as the "gold standard". Materials and Methods: A cross-sectional study was performed, with prospective data collection in a cohort of VIH+ patients, who have male homosexual anal relations, belonging to Gregorio Marañón and Infanta Leonor Hospitals in a period of 2 years. Results: A total of 179 patients were selected with 286 visits to the screening Outpatient Clinic in which 3 parallel screening tests were performed (anal cytology, HPV genotyping and high resolution anoscopy (AAR) with a biopsy directed on a suspicious or random area). The sensitivity and specificity for the detection of high-grade dysplasia and cancer and their degree of agreement with the biopsy was as follows: cytology 3.23%/94.43% (k: 0.03), high HPV genotyping. risk 90.32%/27.45% (k: 0.05), AAR 32.26%/87.45 (k: 0, 17), the diagnostic accuracy of the three tests being very low. Conclusion: Cytology shows a very low diagnostic accuracy compared to the genotype that represents the highest one. In light of our results, clinical protocols as they are currently being developed should be abandoned.

Tuberculosis anal como diagnóstico diferencial de lesión ulcerada anal / Anal tuberculosis as a differential diagnosis of ulcerated anal lesion

La tuberculosis (TBC) es una enfermedad infecciosa crónica, granulomatosa, transmisible, producida por el microorganismo Mycobacterium tuberculosis o bacilo de Koch. Puede presentarse como enfermedad pulmonar, extrapulmonar o ambas. La presentación extrapulmonar, es rara, representando aproximadamente el 11% de todos los casos. El objetivo del presente trabajo es comunicar un caso clínico de tuberculosis de localización extrapulmonarr infrecuente: la región perianal. (AU)

Tuberculosis (TB) is a chronic infectious, granulomatous, transmissible disease produced by the Mycobacterium tuberculosis microorganism or Koch's bacillus.It can present as lung disease, extrapulmonary disease or both.Extrapulmonary presentation is rare, representing approximately 11% of all cases. The objective of the present work is to report a clinical case of tuberculosis of uncommon extrapulmonary location: the perianal region. (AU)

Perianal hidradenoma papilliferum / Hidradenoma papilífero perianal

ABSTRACT Hidradenoma papilliferum is a benign cystic tumor originated in apocrine sweat glands of the anogenital region. It is common in vulvar topography and rare in the perianal region. A well-documented case of a patient with slow-growing perianal nodulation without pain or other symptoms is reported. The histological study shows a hidradenoma papilliferum. The article reviews the topic and discusses the importance of the differential diagnosis of proctological conditions. A biopsy is mandatory in anal lesions of unusual presentation.

RESUMO O hidradenoma papilífero é um tumor cístico benigno originado nas glândulas sudoríparas apócrinas da região anogenital, sendo comum em topografia vulvar e raro na região perianal. Relata-se um caso bem documentado de paciente com nodulação perianal de crescimento lento, sem dor ou outros sintomas, cujo estudo histológico revelou se tratar de hidradenoma papilífero. O artigo revisa o tema e discute a importância do diagnóstico diferencial das afecções proctológicas, sendo a biópsia obrigatória em lesões anais de apresentação não-usual.

Ablación de las neoplasias intraepiteliales escamosas anales de alto grado, precursoras del cáncer anal, con coagulación infrarroja / Ablation of high-grade anal squamous intraepithelial neoplasms, anal cancer precursors, with infrared coagulation

Introducción: Las neoplasias intraepiteliales anales de alto grado (AIN-AG) sin tratamiento progresan a carcinoma anal escamoso invasor (CAE) en 8-13% de los casos. Esto disminuye al 1,2% con la ablación dirigida por anoscopía de alta resolución (AAR). El tratamiento ideal de la AIN-AG no está establecido. Goldstone, en 2005 introdujo el coagulador infrarrojo (CIR) para la ablación de estas lesiones y demostró que tiene tanta efectividad como la cirugía, aunque menor morbilidad y la ventaja de no requerir quirófano. No hemos encontrado publicaciones con esta técnica en nuestro medio. El objetivo de este trabajo es evaluar los resultados de la ablación de las AIN-AG con CIR, las complicaciones del método y la recurrencia temprana. Diseño: Observacional, retrospectivo, con base de datos prospectiva. Pacientes y Método: Se incluyeron individuos con AIN-AG en conducto anal y/o región perianal diagnosticadas en el Consultorio de Detección Temprana de Displasia Anal del Hospital Juan A. Fernández mediante biopsia dirigida por AAR y tratadas con CIR con el aparato Redfield®, entre marzo 2013-agosto 2014 previo consentimiento informado escrito. Tras infiltración con anestesia local las lesiones fueron coaguladas con repetidos pulsos de 1,5 segundos hasta visualizar los vasos de la submucosa. Se controló entre los 3 y 6 meses con AAR y biopsia de lesiones sospechosas. Resultados: Fueron 14 pacientes (10 hombres que tienen sexo con hombres, todos VIH-positivos y 4 mujeres, 2 VIH-positivas). Edad mediana: 37,5 (rango 20-59) años. La AIN-AG se localizaba en el conducto anal en 11 pacientes y en la región perianal en 3. En la AAR diagnóstica todos presentaban sólo un área de AIN-AG. El procedimiento fue bien tolerado. Una paciente VIH-positiva presentó secreción purulenta a los tres días de la ablación, que se trató con antibióticos. Esta paciente y otro más tuvieron dolor post-procedimiento manejado con anti-inflamatorios no esteroides. En la AAR de control se hallaron 2 (14,3%) recurrencias, una interpretada como persistencia por margen insuficiente de una lesión extendida y otra diagnosticada al momento de realizar CIR, que no había sido observada en la AAR realizada 1 mes antes. La eficacia por lesión individual tratada fue del 92,9%. Conclusiones: El tratamiento de las AIN-AG en el consultorio mediante CIR es bien tolerado, tiene mínimas complicaciones y resulta efectivo en el corto plazo. Es necesario un seguimiento más prolongado para evaluar la tasa de recidiva y la utilidad para prevenir la progresión al CAE. (AU)

Background: High-grade anal intraepithelial neoplasia (HGAIN) without treatment progresses to invasive squamous cell carcinoma (SCC) in 8-13% of cases, and that incidence decreases to 1,2% with ablation targeted with high resolution anoscopy (HRA). The ideal treatment for HGAIN is not established yet. Goldstone, in 2005 introduced the infrared coagulator (IRC) for the ablation of these lesions, and with great experience demonstrated that it is as effective as surgery but has less morbidity and the advantage of not requiring the operating room. To our knowledge there are not publications with this technique in our country. The aim of this study is to assess the results of HGAIN ablation with CIR, the method complications, and early recurrence. Design: Observational, retrospective study, with prospective database. Patients and Methods: Individuals with HGAIN in the anal canal or the perianal region, diagnosed with biopsy targeted with HRA and treated with the IRC in the Anal Dysplasia Clinic of the Hospital Juan A. Fernández, between March 2013 and August 2014, were included. After written informed consent, HRA was repeated in the outpatient clinic to localize the area to be treated with the IRC Redfield®. After local anesthesia the lesions were coagulated with repeated 1.5 seconds pulses until the submucosa vessels were visualized. Control with HRA and biopsy of suspicious lesions was performed between 3-6 months of the procedure. Results: Fourteen patients (10 men who have sex with men, all HIV-positive, and 4 women, 2 HIV-positive). Median age: 37.5 (range 20-59) years. The HGAIN was localized at the anal canal in 11 patients, and in the perianal region in 3. In the diagnostic HRA all patients presented only one area of HGAIN. The procedure was well tolerated. Only one HIV-positive woman presented purulent discharge 3 days after ablation, and was treated with antibiotics. The latter and another patient had post-procedure pain, managed with non-steroidal anti-inflammatory drugs. In the control HRA, 2 (14,3%) recurrences were found, 1 was interpreted as persistency due to insufficient margin of a extended lesion, and 1 diagnosed during the CIR of other lesion, that had went unaware at the initial HRA performed one month before. The efficacy for individual lesion treated was 92.9%. Conclusions: The treatment of HGAIN with IRC in the outpatient department is well tolerated, has minimal complications, and is effective in the short term. It is necessary a longer surveillance to assess the recurrence rate and the usefulness for preventing progression to SCC. (AU)

Melanoma anorrectal: a propósito de un caso / Anorectal melanoma: a case report

Introducción: El melanoma anorrectal es una neoplasia poco frecuente, que posee mal pronóstico debido a lo avanzado de la enfermedad al momento del diagnóstico, con una sobrevida a los cinco años menor al 10%. A diferencia del melanoma cutáneo, hasta el 87% de los melanomas anorrectales pueden ser amelanocíticos. Suele presentarse con sintomatología inespecífica, principalmente con rectorragia o como hallazgo incidental en colonoscopías. Caso clínico: Paciente sexo femenino de 63 años que presenta rectorragia de 4 meses de evolución. El diagnóstico fue confirmado con biopsia rectal e inmunohistoquímica con marcadores HBM 45 y S100 positivos. Estudio de diseminación resultó negativo. El tratamiento de elección fue la resección abdominoperineal. Conclusiones: Actualmente, no existe una diferencia significativa en la sobrevida en aquellos pacientes que se someten a resección abdominoperineal (Operación de Miles) en relación a aquellos que se les realiza resección local más radioterapia. Es necesario obtener siempre un margen quirúrgico adecuado, sin comprometer severamente la funcionalidad del esfínter anal. (AU)

Introduction: Anorectal melanoma is a rare, highly mlignant tumor due to its lack of early diagnosis, with a poor poor 5-year survival of 10%. About 87% of anorectal melanomas are amelanotic. Patients often present with non-specific symptoms, mainly with rectal bleeding. Case report: The following is a reported case from Felix Bulnes Hospital. A 63-year-old female patient who presented 4-month rectal bleeding. The diagnosis was confirmed with rectal biopsy and immunohistochemistry with expression of HBM 45 and S100 protein. Abdominoperineal resection was the treatment of choice. Conclusion: Patients undergoing radical surgery have no significant survival difference compared to those undergoing local excision with radiation therapy. (AU)

Perianal leiomyoma / Leiomioma de localização perianal

Abstract Leiomyomas are smooth muscle tumors and may occur in places where these fibers are present, while the anorectal location is rare. They are commonly incidental imaging findings and in most cases, patients are asymptomatic. The therapeutic recommendation is tumor resection and postoperative follow-up. Case report: a 38-year-old Black woman had, one year ago, a swelling in perianal right region, which showed slow and progressive growth. She denied bowel habit alterations, local pain, hematochezia, or tenesmus. Proctologic examination showed a fibroelastic, regular, mobile, painless nodule measuring 10 cm at its largest diameter in the right perianal region, next to the anal verge. The soft tissue ultrasound image identified a solid, hypoechoic, and discreetly vascularized nodule in the perianal, superficial right gluteal region that did not reach the adjacent muscles. A complete resection of perineal tumor was carried out in the ventral position. Histological and immunohistochemical analyses disclosed a leiomyoma with a positive finding for actin smooth muscle and negative for desmin. She is currently asymptomatic and undergoing outpatient follow-up.

Resumo Os leiomiomas são tumores da musculatura lisa podendo ocorrer nos locais onde essas fibras estão presentes, sendo rara a localização anorretal. Na maioria dos casos os pacientes são assintomáticos, sendo comumente achados de exame de imagem. A recomendação terapêutica é a ressecção tumoral e o seguimento pós-operatório. Relato do caso: mulher, 38 anos, negra. Há um ano, apresentou abaulamento em região perianal direita, de crescimento lento e progressivo. Negava alteração do hábito intestinal, dor local, hematoquezia, puxo ou tenesmo. Ao exame proctológico, apresentava nodulação fibroelástica, regular, móvel, indolor, com 10 cm de diâmetro em região perianal à direita, próxima à borda anal. Realizou ultrassonografia de partes moles que identificou imagem nodular, sólida, hipoecogênica e discreta vascularização em parte superficial perianal e glútea direita, não envolvendo musculatura adjacente. Foi submetida à ressecção completa do tumor via perineal, em posição ventral. O laudo histológico e imuno-histoquímico revelou leiomioma, com achado positivo para actina de músculo liso e negativo para desmina. Atualmente está assintomática, em seguimento ambulatorial.