Rare Presentations of Frontal Sinus Fungus Ball: A Systematic Review

Abstract Introduction The sinus fungus ball is an agglomeration of debris and hyphae, mainly caused by Aspergillus fumigatus, within the paranasal sinus, commonly affecting a single sinus, and it only rarely affects the frontal sinus. Objective To identify the state of the art of fungus ball in paranasal sinuses, especially related to the epidemiology of the disease in the frontal sinus. Additionally, this article reports a rare case of fungus ball in the frontal sinus in an adult male, and discusses the variables of this condition related to the patient. Data Synthesis All of the 8 cases of fungus ball in the frontal sinus reported in this study affected male patients: 40% had unilateral disease, and 60%, bilateral disease, contrary to the incidence data of fungus ball in the other paranasal sinuses, which reports unilateral prevalence. However, in the present study, this index changes, with 50% of unilateral and 50% of bilateral incidence regarding frontal sinus involvement. The average age of the patients was 65.36 years (range: 60-74 years). The etiologic agent was Aspergillus spp., and the endonasal endoscopic therapeutic approach corresponded to 80% of cases, while frontal osteoplasty accounted for 20% of cases, reaffirming the prevalence data from other studies. Conclusion Despite being a low-incidence entity, frontal sinus fungus ball should be considered in patients with pain in the frontal region refractory to the usual clinical treatments.

Selective hemorrhoidal dearterialization with high mucopexy in the surgical treatment of hemorrhoidal disease

The doppler-guided transanal hemorrhoidal dearterialization technique associated with mucopexy is a noninvasive surgical option used to treat hemorrhoidal disease (HD). Objective: To compare and analyze the results using a variation of the doppler-guided transanal hemorrhoidal dearterialization technique with the technique of selective hemorrhoidal dearterialization with high mucopexy in the treatment of HD. Method: A total of 292 patients who underwent surgical treatment for grade II, III and IV HD from March 2012 to December 2017 were studied. From this total, 110 (37.6%) patients underwent a conventional doppler-guided transanal hemorrhoidal dearterialization with mucopexy (CD), and 182 (62.3%) underwent selective hemorrhoidal dearterialization with highmucopexy (SHeLF). In the group of patients undergoing CD, 4 patients (3.64%) had grade II HD, 82 (74.55%) grade III, and 24 (21.82%) grade IV. In the group submitted to SHeLF, 18 (9.89%) patients had grade II HD, 86 (47.25%) had grade III, and 65 (35.71%) had grade IV. The same surgeon operated all patients under spinal anesthesia. In patients undergoing CD, six arterial branches have been dearterialized, while in patients undergoing SHeLF, the hemorrhoidary nipples submitted to a dearterialization were selected (from 1 to 5) by intraoperative evaluation followed by high rectal mucopexy. In the postoperative period, the following parameters were evaluated: pain, tenesmus, bleeding, and recurrence. Moderate results to severe pain was a postoperative complaint reported by 13 (11.82%) patients undergoing CD, and by 19 (10.44%) undergoing SHeLF. Intense tenesmus was reported by 26 (23.64%) patients undergoing CD and by 7 (3.85%) undergoing SHeLF. Three patients (2.73%) undergoing CD and 1 (0.55%) undergoing SHeLF evolved with postoperative bleeding. One patient (0.55%) in the group undergoing CD required surgical review of hemostasis. Six patients (5.45%) who underwent CD and 8 (4.39%) who underwent SHeLF were reoperated due to disease recurrence. Conclusion: Comparing statistics, patients undergoing the SHeLF technique have less postoperative pain, tenesmus and postoperative bleeding when compared with CD. (AU)

Application value of transanal endoscopic partial intersphincteric resection for ultra-low rectal cancer / 中华消化外科杂志

Objective:To investigate the application value of transanal endoscopic partial intersphincteric resection for ultra-low rectal cancer.Methods:The retrospective and descriptive study was conducted. The clinicopathological data of 9 ultra-low rectal cancer patients undergoing transanal endoscopic partial intersphincteric resection at the First Affiliated Hospital of Xiamen University from December 2017 to August 2020 were collected. There were 8 males and 1 female, aged from 39 to 62 years, with a median age of 58 years. Observation indicators: (1) surgical and postoperative situations; (2) postoperative pathological examination; (3) follow-up. Follow-up was conducted using outpatient examination and telephone interview to detect postoperative tumor local recurrence and distant metastasis, survival of patients, ileostomy closure, anus function at 3 months after ileostomy closure, male urinary and sexual function and female sexual function at 6 months after rectal surgery. The follow-up was up to February 2021. Measurement data with normal distribution were represented as Mean± SD, and measurement data with skewed distribution were represented as M(range). Count data were described as absolute numbers. Results:(1)Surgical and postoperative situations: all 9 patients underwent surgery successfully, without conversion to open surgery. Seven of the 9 patients underwent transanal endoscopic partial intersphincteric resection and the rest of 2 patients with tumor close to the dentate line underwent transanal endoscopic modified partial intersphincteric resection. The operation time and volume of intraoperative blood loss of 9 patients were (267±48)minutes and 50 mL(range, 30?60 mL), respectively. Five of the 9 patients underwent transanal specimen extraction, and 4 patients underwent specimen extraction by an abdominal incision. All 9 patients underwent transanal hand-sewn coloanal anastomosis and protective ileostomy, and two pelvic drainage tubes were indwelled. Transanal drainage tube was placed after anastomosis in 3 of 9 patients. Three cases had intraoperative adverse events and there were no intraoperative adverse event reported in the remaining 6 cases. The time to postoperative initial stoma exhausting and time to postoperative first semi-liquid food intake of 9 patients were 3 days(range, 2?4 days) and 5 days(range, 4?7 days), respectively. One case had Clavien-Dindo grade Ⅰ complication and 2 cases had Clavien-Dindo grade Ⅱ complication during postoperative 30 days and the rest of 6 cases had no postoperative complication. No anastomotic stricture, hemorrhage or urinary retention occurred in 9 patients. The duration of postoperative hospital stay and cost of hospitalization of 9 patients were 11 days(range, 9?23 days) and (6.8±1.3)×10 4 yuan, respectively. (2) Postoperative pathological examination: the diameter of tumor, the distance of distal resection margin, the number of lymph node dissected and the number of positive lymph node of 9 patients were (3.2±1.4)cm, 0.6 cm(range, 0.5?1.5 cm), 17±7 and 0(range, 0?7), respectively. The tumor histopathological type was adenocarcinoma with negative tumor nodule and nerve infiltration in all 9 patients. Only 1 case of 9 patients was found vascular tumor thrombus. The surgical specimens of all 9 patients showed negative for distal and circumferential margins and complete mesorectum. Results of postoperative pathological TNM staging showed that of 6 cases with preoperative T1-T2 staging tumors, 3 cases were classified as pT2N0M0 stage, and 3 cases were classified as pT2N1M0 stage, pT2N2M0 stage or pT3N1M0 stage, respectively. Three cases with preoperative T3 staging tumors were classified as ypT0N0M0 stage, ypT2N0M0 stage or ypT3N0M0 stage, respectively. (3) Follow-up: all 9 patients were followed up for 6 to 13 months, with a median follow-up time of 9 months. No local recurrence, distant metastasis or tumor-related death was found during follow-up. Of the 9 patients, only 1 case did not receive stoma closure and undergo anus function assessment, and the rest of 8 cases underwent stoma closure. Results of postoperative anus function assessment showed 5 cases of accessibility, 2 cases of mild impairment and 1 case of severe impairment. Results of urogenital function assessment showed 6 cases of the 8 male patients of mild impairment, 1 case of moderate impairment and 1 case of severe impairment in micturition function, respectively, and 3 cases of accessibility, 2 cases of mild impairment and 3 cases of moderate impairment in sexual function, respectively. The female patient underwent accessibility of sexual function and the six-item version of the female sexual function index was 25. Conclusion:Transanal endoscopic partial intersphincteric resection can be used for the treatment of ultra-low rectal cancer.

Surgical and postoperative evaluations of rectal adenomas excised with a rigid proctoscope

Abstract Purpose This study presents the surgical and postoperative results achieved with a rigid proctoscope using the transanal endoscopic technique to excise rectal adenomas. The results are compared to the results obtained with other currently employed transanal techniques. Methods We investigated the medical records of patients who underwent transanal endoscopic operations from April 2000 to June 2018 at two tertiary referral centers for colorectal cancer. Results This study included 99 patients. The mean age was 65.3 ± 13.3 years. The average size of the adenomas was 4.6 ± 2.3 cm, and their average distance to the anal border was 5.6 ± 3.3 cm. The average operative time was 65.3 ± 41.7 min. In 48.5% of the operations, the specimen was fragmented, and in 59.6% of the cases, the microscopic margins were free. The rates of postoperative complications and relapse were 5% and 19%, respectively. The mean follow-up was 80 ± 61.5 months. Conclusions The described proctoscope proved to be a viable technique with results similar to other techniques, with the advantage that it allowed greater accessibility for surgeons. Therefore, its use could be implemented and become widespread in surgical practice.

Resolución por mínimo acceso en extrusión anal de catéter de derivación ventrículo peritoneal / Resolution for minimum access in anal extrusion of peritoneal ventricle shunt catheter

RESUMEN Introducción: son múltiples las complicaciones de la derivación ventrículo peritoneal, entre ellas la infección de la derivación, obstrucción y desconexión, son las más frecuentes. Por otro lado, el pseudoquiste de líquido cefalorraquídeo, hernia inguinal, hidrocele y perforación intestinal, son ocasionales. Objetivo: describir la cirugía laparoscópica como método de tratamiento de la extrusión anal del catéter como complicación de la derivación ventrículo peritoneal. Presentación del caso: se presenta un caso de un paciente neurointervenido a causa de un colesteatoma del clivus, al cual se le realiza una derivación ventrículo peritoneal debido a una hidrocefalia secundaria a compresión del suelo del tercer ventrículo, por el crecimiento supraselar de la lesión. Acude al servicio de Neurocirugía a causa de extrusión del extremo distal del catéter a través del ano. Después de confirmar esta complicación a través de colonoscopia, se realizó cirugía laparoscópica para retirar el extremo extruido. Conclusiones: el paciente evolucionó sin complicaciones posquirúrgicas y dado de alta hospitalaria. La cirugía por mínimo acceso ofrece ventajas con respecto a la laparotomía en la resolución de esta complicación.

ABSTRACT Introduction: there are multiple complications of peritoneal ventricle shunt, including infection of the shunt, obstruction and disconnection, are the most frequent. On the other hand, cerebrospinal fluid pseudo cyst, inguinal hernia, hydrocele and intestinal perforation are rare. Objective: to describe a laparoscopic surgery as a method of treatment of anal catheter extrusion as a complication of peritoneal ventricular bypass. Case report: a patient with a neurosurgery because of a cholesteatoma of the clivus, to which a peritoneal ventricle derivation is made due to a hydrocephalus secondary to the compression of the floor of the third ventricle, by the suprasellar growth of the lesion. The patient came to the Neurosurgery Service because of extrusion of the distal end of the catheter through the anus. After confirming this complication through colonoscopy, laparoscopic surgery was performed to remove the extruded end. Conclusions: the patient evolved without post-surgical complications and was discharged from the hospital. Minimal access surgery offers advantages over laparotomy in the resolution this complication.

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.

Chinese consensus on transanal endoscopic surgery (2019 version) / 中华胃肠外科杂志

With the promotion of transanal total mesorectal excision (taTME) nationwide, transanal endoscopic surgery has become more and more widely used. However, at present, there is still a situation in the domestic colorectal surgery community that is not uniform, in-depth and not standardized in the understanding of the issues related to transanal endoscopic surgery. In order to clarify the key issues of transanal endoscopic surgery, including definition, indications, contraindications, surgical classification, basic principles of surgery, prevention and treatment of complications, the experts of the writing committee based on the existing evidence combined with clinical practice to verify the definition of transanal endoscopic surgery, indications, contraindications and surgical classification, by means of voting for key issues such as intraoperative sterility, no tumor principle, surgical quality control, specimen removal method, digestive tract reconstruction, how to solve intraoperative pressure instability, how to ensure the safety of anastomosis, and prevention and treatment of complications, aiming at providing guidance for transanal endoscopic surgery in China.

Feasibility of transanal total mesorectal excision in cases with challenging patient and tumor characteristics

PURPOSE: To assess the feasibility of transanal total mesorectal excision in difficult cases including obese patients or patients with bulky tumors or threatened mesorectal fascias. METHODS: We performed laparoscopy-assisted transanal total mesorectal excision in patients with biopsy-proven rectal adenocarcinoma located 3–12 cm from the anal verge as part of a prospective, single arm, pilot trial. The primary endpoint was resection quality and circumferential resection margin involvement. Secondary endpoints included the number of harvested lymph nodes and 30-day postoperative complications. RESULTS: A total of 12 patients (9 men and 3 women) were enrolled: one obese patient, 7 with large tumors and 8 with threatened mesorectal fascias (4 patients had multiple indications). Tumors were located a median of 5.5 cm from the anal verge, and all patients received preoperative chemoradiotherapy. Median operating time was 191 minutes, and there were no intraoperative complications. One patient needed conversion to open surgery for ureterocystostomy after en bloc resection. Complete or near-complete excision and negative circumferential resection margins were achieved in all cases. The median number of harvested lymph nodes was 15.5. There was no postoperative mortality and 3 cases of postoperative morbidity (1 postoperative ileus, 1 wound problem near the stoma site, and 1 anastomotic dehiscence). CONCLUSION: This pilot study showed that transanal total mesorectal excision is also feasible in difficult laparoscopic cases such as in obese patients or those with bulky tumors or tumors threatening the mesorectal fascia. Additional larger studies are needed.

Chinese consensus on transanal endoscopic surgery (2019 version) / 中华胃肠外科杂志

With the promotion of transanal total mesorectal excision (taTME) nationwide, transanal endoscopic surgery has become more and more widely used. However, at present, there is still a situation in the domestic colorectal surgery community that is not uniform, in-depth and not standardized in the understanding of the issues related to transanal endoscopic surgery. In order to clarify the key issues of transanal endoscopic surgery, including definition, indications, contraindications, surgical classification, basic principles of surgery, prevention and treatment of complications, the experts of the writing committee based on the existing evidence combined with clinical practice to verify the definition of transanal endoscopic surgery, indications, contraindications and surgical classification, by means of voting for key issues such as intraoperative sterility, no tumor principle, surgical quality control, specimen removal method, digestive tract reconstruction, how to solve intraoperative pressure instability, how to ensure the safety of anastomosis, and prevention and treatment of complications, aiming at providing guidance for transanal endoscopic surgery in China.

Establishment of transanal total mesorectal excision training system / 中华消化外科杂志

Transanal total mesorectal excision (TaTME) is a hot topic in the field of colorectal surgery.After nearly ten years of development,it has entered a period of rapid development.Due to the difference between the traditional surgical approach and the previous one,more sufficient preconditions are needed to carry out TaTME cautiously.Therefore,systematic and stan-dardized training is indispensable.Compared with the mature foreign cadaver training courses,the domestic cadaver training is limited,while the traditional laparoscopic animal training model has limited effects on the training of transanal endoscopic surgery.Therefore,how to use the existing domestic conditions to build a training system suitable for Chinese national conditions,so as to standardize the implementation of transanal total mesorectal excision,improve the safety of new technologies,has become an urgent problem to be solved.This article has reviewed deve-lopment history of TaTME training and investigated establishment of TaTME training system,intending to provide references for standardization of TaTME.

Resección transanal de lesiones de recto vía TAMIS: Análisis de una serie inicial / TAMIS resection for rectal tumors

Antecedentes: la resección de lesiones benignas y neoplasias en estadio temprano de recto representan un desafío para minimizar la recidiva local y lograr una calidad adecuada de la pieza quirúrgica sin fragmentación, con mínima morbilidad y funcionalidad anorrectal aceptable. La resección transanal convencional y las resecciones endoscópicas presentan inconvenientes para asegurar estos resultados. Por ello, el abordaje con técnica TAMIS (transanal minimally invasive surgery) se ofrece como una opción factible para mejorar tales índices. Objetivo: describir la primera serie de casos llevados a cabo en forma cooperativa en diferentes instituciones del interior del país, analizando su factibilidad y resultados inmediatos. Material y métodos: serie de casos realizados entre 2015 y 2017. Se incluyeron 14 pacientes con lesiones de recto utilizando la técnica TAMIS. Se analizaron los datos demográficos, características de dichas lesiones, técnica quirúrgica, morbilidad inmediata y resultado histológico. Resultados: se operaron 9 hombres (64%) y 5 mujeres (36%). El promedio de edad fue 56 años. El tamaño de las lesiones osciló entre 2,5 cm y 5 cm. Se ubicaron entre 7 y 15 del margen anal. La morbilidad fue del 7,6%, sin mortalidad. El tiempo de internación fue de 24 horas. Las piezas de resección fueron completas y mostraron márgenes libres de lesión en el 92% de los casos. Conclusiones: la técnica TAMIS fue eficaz y factible para la resección de las lesiones de recto. Se realizó con seguridad. Ofreció además las ventajas del abordaje mininvasivo.

Background: resection of benign and early malignant lesions of the rectum are a challenge to reduce local recurrence, and to achieve adequate rectal resection, specimens without fragmentation and low morbimortality. Since neither the transanal, conventional nor the endoscopic approaches ensure the desired results, transanal minimally invasive surgery (TAMIS) may ariseas a feasible option. Objetive: to describe results, feasibility and safety of an initial series of TAMIS performed in a cooperative group including several provinces of Argentina. Material and methods: a cases series performed between 2015 and 2017. Fourteen patients were operated on by TAMIS for low rectal lesions. Demographics, type of lesion, surgical technique, postoperative morbidity and histologic results were analyzed. Results: nine men and 5 women were included (average age, 56 years). The size of the lesions ranged between 5 and 15 cm from the anal margin. Morbidity was 7.6%, without mortality. Hospital stay was of 24 hours. Resection specimens were complete and showed tumor free margins in 92% of cases. Conclusion: TAMIS was both effective and feasible to achieve local resection for rectal lesions. The technique was safe. Advantages due to minimally invasive surgery were present as well.

Feasibility of transanal endoscopic total mesorectal excision for rectal cancer: results of a pilot study

PURPOSE: To evaluate the feasibility of transanal total mesorectal excision (TME) in patients with rectal cancer. METHODS: This study enrolled 12 patients with clinically node negative rectal cancer located 4–12 cm from the anal verge who underwent transanal endoscopic TME with the assistance of single port laparoscopic surgery between September 2013 and August 2014. The primary endpoint was TME quality; secondary endpoints included number of harvested lymph nodes and postoperative complications within 30 days (NCT01938027). RESULTS: The 12 patients included 7 males and 5 females, of median age 59 years and median body mass index 24.2 kg/m². Tumors were located on average 6.7 cm from the anal verge. Four patients (33.3%) received preoperative chemoradiotherapy. Median operating time was 195 minutes and median blood loss was 50 mL. There were no intraoperative complications and no conversions to open surgery. TME was complete or nearly complete in 11 patients (91.7%). Median distal resection and circumferential resection margins were 18.5 mm and 10 mm, respectively. Median number of harvested lymph nodes was 15. Median length of hospital stay was 9 days. There were no postoperative deaths. Six patients experienced minor postoperative complications, including urinary dysfunction in 2, transient ileus in 3, and wound abscess in 1. CONCLUSION: This pilot study showed that high-quality TME was possible in most patients without serious complications. Transanal TME for patients with rectal cancer may be feasible and safe, but further investigations are necessary to evaluate its long-term functional and oncologic outcomes and to clarify its indications.

The study of clinical effect and mechanism on Jianpi-Huayu decoction preventing against ;recurrence of colonic adenoma after endoscopic mucosal resection / 国际中医中药杂志

Objectives To observe the effect of Jianpi-Huayu decoction for preventing the patients from the recurrence of colonic adenoma after endoscopic mucosal resection. Methods A total of 60 patients with colonic adenoma who received endoscopic mucosal resection were divided randomly into the experimental group (taking Jianpi-Huayu decoction) and the controlled group (taking nothing as treatment), 30 patients in each group. Both groups were treated for 1 year. After 1 year, colonscopy was taken, and the number and size of colonic adenoma were recorded. The expression of COX-2, Ki67 in the colonic mucosa were detected the immunohistochemistry, and the negative rate of COX-2, Ki67 were also detected. Results After the treatment, the number (0.20 ± 0.48 vs. 1.67 ± 1.54, t=4.980) and size (0.23 ± 0.57 vs. 2.73 ± 2.80, t=4.788) of colonic adenoma in the experimental group were statistically lower than those in the ontrolled group (P<0.01);the expression of COX-2 (1.96 ± 1.27 vs. 3.64 ± 1.95, t=3.673) and Ki67 (2.04 ± 1.46 vs. 4.50 ± 1.73, t=5.558) in the the experimental group were statistically lower than those in the ontrolled group (P<0.01). The number of the paitents whose COX-2, Ki67 negative rates in the experimental group were 21 and 22, and the control group were 12(P=0.004) and 14 (P<0.001), which showed the significant difference between two groups. Conclusions The Jianpi-Huayu decoction could reduce recurrence of colonic adenoma after endoscopic mucosal resection, the mechanism was decreasing the expression of COX-2, Ki67 in colonic mucosa.

Cirugía transanal a través de puerto único (TAMIS). Revisión frente otras técnicas de excisión endoscópica de lesiones rectales / Transanal surgery through single port (TAMIS). Revision front of the techniques of endoscopic excision of rectal lesions

Introducción: los programas de screening y la mejora en las técnicas diagnósticas han aumentado el porcentaje de tumores rectales que se pueden tratar en estadios iniciales. La morbimortalidad asociada a la cirugía radical de la neoplasia rectal, así como la tendencia a una cirugía menos agresiva, ha hecho que se desarrollen las técnicas de abordaje transanal, aplicando las últimas tecnologías disponibles. Material y métodos: se realizó una revisión de la literatura, considerando las diferentes técnicas de excisión endoscópica. Resultados: la cirugía endoscópica transanal, en todas sus variantes, ha demostrado ser un abordaje seguro para el tratamiento de adenomas y tumores rectales en estadios iniciales (pT1N0). Conclusión: son necesarios más estudios que permitan demostrar la seguridad de ampliar esta técnica para el tratamiento de lesiones avanzadas, asociada a quimio-radioterapia neoadyuvante.

Background: screening programs and improvement of diagnostic techniques have increased the percentage of rectal tumors that can be treated in an early stage. Radical surgery of the rectum is associated with high morbimortality, and the general tendency towards a less aggressive surgery has led to the development of transanal techniques, adjusting the latest technologies available. Methods: a review of the literature, including the different types of endoscopic surgery available. Results: transanal endoscopic microsurgery, in all its variants, has proven to be a safe and effective method for treating rectal adenomas and early stage cancer (pT1N0). Conclusion: further studies are required to prove the safeness of these techniques on more advanced lesions, in association with neoadjuvant chemoradiation therapy.

Transanal local excision of carcinoid tumors in the upper rectum under proctoscope: A clinical report of 6 cases / 中国微创外科杂志

Objective To study surgical techniques and clinical effects of minimally invasive excision of high rectal carcinoid tumors with anus preservation. Methods We conducted transanal local excision of rectal carcinoid tumors in 6 cases by using self-made proctoscope and laparoscopic instruments from August 2002 to January 2005. The tumors were located on the depth of 9~12 cm from the anal verge, and excision margin was 0.5~1 cm from the tumors. Results All the operations were performed successfully. A follow-up for 3~28 months (mean, 15 months) found no recurrence, metastasis, rectal stenosis, or other short- or long-term complications. The postoperative hospital stay was 3~6 days. No analgesics were required. Conclusions Transanal local excision of high rectal carcinoid tumors under proctoscope is safe, reliable, minimally invasive, and cost-effective.