ABSTRACT
Introducción. El carcinoma de células escamosas es una patología relativamente frecuente en Paraguay, que debe ser diagnosticada y tratada a tiempo. La variedad sarcomatoide es un subtipo poco frecuente, pero mucho más agresivo que la presentación convencional, con altas tasas de recurrencia y metástasis linfática. La exposición previa a radiación es uno de los principales factores desencadenantes. Caso clínico. Paciente de 83 años con antecedente de radioterapia por carcinoma escamocelular del paladar blando, quien consultó por una masa en el borde lateral de la lengua que correspondió a un carcinoma escamocelular del subtipo sarcomatoide. Resultados. El paciente fue sometido a cirugía y quimioterapia, pero presentó recaída tumoral a los cuatro meses, sin aceptar una cirugía de rescate, optando por el tratamiento paliativo y falleciendo a los pocos meses. Conclusión. El examen exhaustivo de la cavidad oral en una primera consulta permite identificar lesiones en estadios tempranos y el tratamiento multidisciplinario temprano puede mejorar la supervivencia global. El pronóstico de estos pacientes en estadios avanzados es desalentador. Actualmente la cirugía microvascular es la mejor opción terapéutica, pero la hemiglosectomía sin reconstrucción sigue siendo una opción aceptable en nuestro medio, conociendo los altos costos de la primera y el requerimiento de un grupo mayor de especialistas, largos tiempos quirúrgicos y estancias hospitalarias.
Introduction. Squamous cell carcinoma is a relatively common pathology in Paraguay, which must be diagnosed and treated on time. The sarcomatoid variety is a rare subtype, but much more aggressive than the conventional presentation, with high rates of recurrence and lymphatic metastasis. Previous exposure to radiation is one of the main triggering factors. Clinical case. An 83-year-old patient with a history of radiotherapy for squamous cell carcinoma of the soft palate, who consulted for a mass on the lateral edge of the tongue that corresponded to a squamous cell carcinoma of the sarcomatoid subtype. Results. The patient underwent surgery and chemotherapy, but had tumor relapse after four months, without accepting salvage surgery, opting for palliative treatment and dying a few months later. Conclusion. Exhaustive examination of the oral cavity in a first consultation allows lesions to be identified in early stages and early multidisciplinary treatment can improve overall survival. The prognosis of these patients in advanced stages is discouraging. Currently, microvascular surgery is the best therapeutic option, but hemiglossectomy without reconstruction continues to be an acceptable option in our environment, knowing the high costs of the former and the requirement for a larger group of specialists, long surgical times and hospital stays.
Subject(s)
Humans , Tongue Neoplasms , Carcinoma, Squamous Cell , Radiotherapy , Sarcoma , Carcinosarcoma , Neoplasm Recurrence, LocalABSTRACT
Introduction Differentiated thyroid carcinoma (DTC) has increased incidence. Intermediate- and high-risk patients have lymph node relapse rate ranging from 10 to 50%, and receive multiple reinterventions, increasing the morbidity of the disease. Currently, there are no established guidelines for the use of second radioactive iodine (RAI) therapy after the reintervention for local recurrence. Materials and Methods This is a retrospective review of the medical records of 1,299 patients treated from January 2016 to July 2019 with DTC. We included 48 patients who received total thyroidectomy, RAI remnant ablation, surgery to remove the locally recurrent/persistent papillary thyroid carcinoma (PTC), and received a second RAI therapy. Results There were no significant differences between thyroglobulin (Tg) levels before reoperation (Tg0), Tg levels postoperatively (Tg1), and Tg levels after 6 months of second adjuvant RAI therapy (Tg2). However, we evidenced a 69.79% drop in first Tg levels (Tg0: 24.7 vs. Tg1: 7.56, p =0.851) and 44.4% decrease in second Tg levels (Tg1: 7.56 vs. Tg2: 4.20, p =0.544). Also, 77.1% of the patients did not have another documented recurrence. The median relapse-free time was 10.9 months (range: 1.3-58.2 months). Conclusion The results of the study cannot assess that a second RAI treatment after reoperation for locoregionally persistent or recurrent disease have a significant impact on treatment outcomes in intermediate- or high-risk patients with PTC. However, the 77.1% of patients have not presented a second documented recurrence and the median values of Tg and TgAb levels showed a substantial decrease after surgery and second RAI treatment.
ABSTRACT
Introducción. Dado que un ensayo clínico aleatorio es irrealizable, el rol del vaciamiento ganglionar profiláctico en pacientes con cáncer papilar de tiroides sin comprobación clínica de compromiso ganglionar metastásico (cN0) es controversial. El vaciamiento ganglionar profiláctico acarrea un proceso de reclasificación de pacientes, al hacer evidente la positividad ganglionar micrometastásica antes ignorada, lo que genera una aparente pero falsa mejoría en los desenlaces de los grupos de estadificación, mientras el pronóstico individual y total de la población no cambia, fenómeno conocido como migración de estadio o fenómeno de Will Rogers. Métodos. Se ejecutaron simulaciones de poblaciones con cáncer papilar de tiroides con compromiso ganglionar metastásico clínicamente evidente (cN+) y cN0, para determinar el impacto del fenómeno de migración de estadio en los pacientes sometidos a vaciamiento ganglionar profiláctico. Resultados. Con la simulación de las poblaciones y sus estadios ganglionares, se observa cómo la migración de estadio ganglionar genera una aparente mejoría en los desenlaces de recurrencia loco regional y supervivencia, sin cambiar los desenlaces de la población total ni individuales. Discusión. El fenómeno de migración de estadio es uno de los sesgos más importantes que limitan el uso de grupos históricos de control en ensayos de tratamiento experimental. De acuerdo con nuestros resultados, este fenómeno podría explicar los beneficios observados con el vaciamiento ganglionar profiláctico en algunos de los estudios agregativos publicados hasta el momento, hallazgos que no han sido documentados para el cáncer papilar de tiroides
Introduction. The role of prophylactic central lymph node dissection at the time of total thyroidectomy remains controversial in clinically node-negative (cN0) papillary thyroid carcinoma. Moreover, a prospective randomized controlled trial of prophylactic central lymph node dissection in cN0 RCT is not readily feasible. Methods. In this study we simulated cN0 and clinically node-positive (cN+) populations, to evaluate impact of nodal stage migration in papillary thyroid carcinoma patients that undergo prophylactic central neck dissection. We use simulations of population and nodal stages .Results. Nodal stage migration phenomenon seems to have an improvement in locoregional recurrence and overall survival of cN0 and cN+ populations, without changes in overall population and individual outcomes.Discussion. Nodal stage migration is recognized as an important bias that precludes the use of historical controls groups in experimental treatment trials. In accordance to our findings, this phenomenon could explain the improvements observed in outcomes in patients that undergo prophylactic central neck dissection
Subject(s)
Humans , Thyroid Cancer, Papillary , Survivorship , Lymph Node Excision , Neoplasm Recurrence, LocalABSTRACT
OBJECTIVE: Extra-abdominal desmoid tumor (EDT) is a rare condition, caused by proliferation of fibroblasts. Despite being a benign tumor, it is locally aggressive and has unpredictable clinical behavior. The objective of this study is to present the clinical outcomes of patients with EDT treated surgically between 1995 and 2016. METHODS: This is a retrospective series of 23 patients with histopathological diagnosis of EDT that underwent surgery at the orthopedic oncology service of our hospital. The information was obtained from the institute's clinical and pathology reports. RESULTS: A total of 223 medical records with histopathological reports were evaluated. Only 23 cases of EDT were included in the present study. The mean age was 22.5 years. Twelve (52.2%) patients had the tumor on the lower limbs, seven (30.4%) on the upper limbs and four (17.4%) cases were reported on the back. Five (21.7%) patients had tumors measuring less than 5 cm, while eighteen (78.3%) patients had tumors measuring more than 5 cm. All patients underwent surgery as the definitive treatment in our institute. Twelve (52.2%) cases presented negative margins (NM) and eleven (47.8%) cases had positive margins (PM). Local recurrence (LR) occurred in eleven (47.8%) patients. CONCLUSION: Impairment of the surgical margin was the only prognostic factor found for LR of EDT. Level of Evidence IV, Case Series.
OBJETIVO: O tumor desmoide extra-abdominal (TDE) é raro, formado por proliferação de fibroblastos. Apesar de ser um tumor benigno, é localmente agressivo e tem comportamento clínico imprevisível. O objetivo desta pesquisa é apresentar os resultados clínicos obtidos nos pacientes com TDE, tratados cirurgicamente entre 1995 e 2016. MÉTODOS: Trata-se de uma série retrospectiva de 23 pacientes com diagnóstico anatomopatológico de TDE, tratados cirurgicamente no serviço de oncologia ortopédica de nosso hospital. A informação foi obtida dos relatos clínicos e patológicos do instituto. RESULTADOS: Um total de 223 prontuários com relato anatomopatológico foi revisado. Apenas 23 casos de TDE foram incluídos no presente estudo. A média de idade foi de 22,5 anos. Doze (52,2%) casos se localizaram nos membros inferiores, sete (30,4%) casos nos membros superiores e quatro (17,4%) casos se localizaram no dorso. Cinco (21,7%) casos tinham tamanho < 5 cm e 18 (78,3%) casos tinham tamanho > 5 cm. Todos os pacientes receberam tratamento cirúrgico como terapia definitiva no instituto. Doze (52,2%) casos apresentaram margens livres (ML) e onze (47,8%) casos tinham margens comprometidas (MC). A recorrência local (RL) ocorreu em onze (47,8%) pacientes. CONCLUSÃO: O comprometimento da margem cirúrgica foi o único fator de prognóstico encontrado para a RL do TDE. Nível de Evidência IV, Série de Casos.
ABSTRACT
ABSTRACT Objective: Extra-abdominal desmoid tumor (EDT) is a rare condition, caused by proliferation of fibroblasts. Despite being a benign tumor, it is locally aggressive and has unpredictable clinical behavior. The objective of this study is to present the clinical outcomes of patients with EDT treated surgically between 1995 and 2016. Methods: This is a retrospective series of 23 patients with histopathological diagnosis of EDT that underwent surgery at the orthopedic oncology service of our hospital. The information was obtained from the institute's clinical and pathology reports. Results: A total of 223 medical records with histopathological reports were evaluated. Only 23 cases of EDT were included in the present study. The mean age was 22.5 years. Twelve (52.2%) patients had the tumor on the lower limbs, seven (30.4%) on the upper limbs and four (17.4%) cases were reported on the back. Five (21.7%) patients had tumors measuring less than 5 cm, while eighteen (78.3%) patients had tumors measuring more than 5 cm. All patients underwent surgery as the definitive treatment in our institute. Twelve (52.2%) cases presented negative margins (NM) and eleven (47.8%) cases had positive margins (PM). Local recurrence (LR) occurred in eleven (47.8%) patients. Conclusion: Impairment of the surgical margin was the only prognostic factor found for LR of EDT. Level of Evidence IV, Case Series.
RESUMO Objetivo: O tumor desmoide extra-abdominal (TDE) é raro, formado por proliferação de fibroblastos. Apesar de ser um tumor benigno, é localmente agressivo e tem comportamento clínico imprevisível. O objetivo desta pesquisa é apresentar os resultados clínicos obtidos nos pacientes com TDE, tratados cirurgicamente entre 1995 e 2016. Métodos: Trata-se de uma série retrospectiva de 23 pacientes com diagnóstico anatomopatológico de TDE, tratados cirurgicamente no serviço de oncologia ortopédica de nosso hospital. A informação foi obtida dos relatos clínicos e patológicos do instituto. Resultados: Um total de 223 prontuários com relato anatomopatológico foi revisado. Apenas 23 casos de TDE foram incluídos no presente estudo. A média de idade foi de 22,5 anos. Doze (52,2%) casos se localizaram nos membros inferiores, sete (30,4%) casos nos membros superiores e quatro (17,4%) casos se localizaram no dorso. Cinco (21,7%) casos tinham tamanho < 5 cm e 18 (78,3%) casos tinham tamanho > 5 cm. Todos os pacientes receberam tratamento cirúrgico como terapia definitiva no instituto. Doze (52,2%) casos apresentaram margens livres (ML) e onze (47,8%) casos tinham margens comprometidas (MC). A recorrência local (RL) ocorreu em onze (47,8%) pacientes. Conclusão: O comprometimento da margem cirúrgica foi o único fator de prognóstico encontrado para a RL do TDE. Nível de Evidência IV, Série de Casos.
ABSTRACT
Prostate cancer imaging has become an important diagnostic modality for tumor evaluation. Prostate-specific membrane antigen (PSMA) positron emission tomography (PET) has been extensively studied, and the results are robust and promising. The advent of the PET/magnetic resonance imaging (MRI) has added morphofunctional information from the standard of reference MRI to highly accurate molecular information from PET. Different PSMA ligands have been used for this purpose including 68gallium and 18fluorine-labeled PET probes, which have particular features including spatial resolution, imaging quality and tracer biodistribution. The use of PSMA PET imaging is well established for evaluating biochemical recurrence, even at low prostate-specific antigen (PSA) levels, but has also shown interesting applications for tumor detection, primary staging, assessment of therapeutic responses and treatment planning. This review will outline the potential role of PSMA PET/MRI for the clinical assessment of PCa.
Subject(s)
Humans , Male , Prostatic Neoplasms/diagnostic imaging , Magnetic Resonance Imaging/methods , Glutamate Carboxypeptidase II , Positron Emission Tomography Computed Tomography/methods , Antigens, Surface , Prostatic Neoplasms/blood , Prostate-Specific Antigen/blood , Neoplasm Recurrence, Local/blood , Neoplasm Recurrence, Local/diagnostic imagingABSTRACT
Acute lymphoblastic leukemia (ALL) is the most common cancer in children. The inclusion of molecular biology techniques in the diagnosis and prognostic stratification of these patients has allowed major treatment achievements in developed countries. One of the best studied gene rearrangements is E2A-PBX1, which predicts isolated central nervous system relapse in patients with ALL. However, further research on the search for new molecular markers related to prognosis of patients with childhood leukemia is required. Such studies need the integration of different disciplines, including epidemiology. Epidemiological studies are needed not only to accelerate the discovery of new molecular markers and new biological signals as to the etiology and pathophysiology of cancer, but also to evaluate the clinical impact of these findings in well-defined populations.
La leucemia linfoblástica aguda (LLA) es el cáncer más frecuente en niños. La inclusión de técnicas de biología molecular en el diagnóstico y la estratificación pronóstica de estos pacientes ha permitido que se logren avances importantes del tratamiento en países desarrollados. Uno de los rearreglos génicos más estudiados es el E2A-PBX1, el cual predice la recaída aislada al sistema nervioso central (SNC) en pacientes con LLA. Es necesaria una mayor investigación acerca de la búsqueda de nuevos marcadores moleculares relacionados con el pronóstico de los pacientes con leucemia infantil. Este tipo de estudios requieren de la integración de diferentes disciplinas del campo de la investigación, entre ellas la epidemiología. Los estudios epidemiológicos son necesarios no solo para acelerar los descubrimientos de nuevos marcadores moleculares y nuevas señales biológicas en cuanto a la etiología y la fisiopatología del cáncer, sino también para para evaluar el impacto clínico de esos descubrimientos en poblaciones bien definidas.
Subject(s)
Biomarkers, Tumor/metabolism , Central Nervous System Neoplasms/metabolism , Homeodomain Proteins/metabolism , Oncogene Proteins, Fusion/metabolism , Precursor Cell Lymphoblastic Leukemia-Lymphoma/metabolism , Central Nervous System Neoplasms/diagnosis , Child , Gene Rearrangement , Humans , Precursor Cell Lymphoblastic Leukemia-Lymphoma/diagnosis , Prognosis , RecurrenceABSTRACT
Many theories have been proposed to explain the origins of cancer. Currently, evidences show that not every tumor cell is capable of initiating a tumor. Only a small part of the cancer cells, called cancer stem cells (CSCs), can generate a tumor identical to the original one, when removed from human tumors and transplanted into immunosuppressed mice. The name given to these cells comes from the resemblance to normal stem cells, except for the fact that their ability to divide is infinite. These cells are also affected by their microenvironment. Many of the signaling pathways, such as Wnt, Notch and Hedgehog, are altered in this tumoral subpopulation, which also contributes to abnormal proliferation. Researchers have found several markers for CSCs; however, much remains to be studied, or perhaps a universal marker does not even exist, since they vary among tumor types and even from patient to patient. It was also found that cancer stem cells are resistant to radiotherapy and chemotherapy. This may explain the re-emergence of the disease, since they are not completely eliminated and minimal amounts of CSCs can repopulate a tumor. Once the diagnosis in the early stages greatly increases the chances of curing cancer, identifying CSCs in tumors is a goal for the development of more effective treatments. The objective of this article is to discuss the origin of cancer according to the theory of stem cell cancer, as well as its markers and therapies used for treatment.
Diversas teorias buscam explicar a origem do câncer. Atualmente, há evidências de que nem todas as células tumorais têm poder de iniciar um tumor. Apenas uma pequena parte das células cancerígenas, chamadas de células-tronco de câncer (do inglês cancer stem cells - CSC), é capaz de iniciar um tumor idêntico ao original quando retirada de tumores humanos e enxertada em camundongos imunossuprimidos. Essas células foram assim denominadas por suas semelhanças com células-tronco normais, exceto pelo fato de que sua capacidade de dividir-se é infinita. Essas células também recebem influência de seu microambiente. Várias vias de sinalização, como WNT, NOTCH e Hedgehog, estão alteradas nessa subpopulação tumoral, contribuindo também para a desregulação de sua proliferação. Pesquisadores descobriram vários marcadores para as CSC, porém ainda há muito a ser pesquisado, ou talvez nem exista um marcador universal, já que eles variam entre cada tipo de tumor e até de paciente para paciente. Foi constatado também que as CSC são resistentes à radioterapia e à quimioterapia, podendo explicar o reaparecimento da doença, visto que, além de não eliminá-la completamente, quantidades mínimas das CSC podem repovoar um tumor. Como o diagnóstico em estágios iniciais aumenta muito as chances de cura do câncer, a identificação das CSC em meio a um tumor é alvo para o desenvolvimento de tratamentos mais eficazes. O objetivo deste artigo é discutir a origem do câncer segundo a teoria das CSC, bem como seus marcadores e as terapias utilizadas em seu tratamento.
Subject(s)
Animals , Humans , Mice , Neoplasms/pathology , Neoplastic Stem Cells , Biomarkers, Tumor , Neoplasm Recurrence, Local , Neoplasms/metabolism , Neoplasms/therapy , Signal Transduction , Stem Cell NicheABSTRACT
Exenteração pélvica é o tratamento cirúrgico radical para diferentes neoplasias pélvicas malignas. Consiste na retirada de todos os órgãos comprometidos pelo câncer, incluindo margens livres de doença. Recidivas ou persistências de tumor maligno na pelve após tratamento radioquimioterápico são a principal indicação, mas pode também ser o tratamento primário do câncer ginecológico localmente avançado. O procedimento apresenta mortalidade perioperatória de 5 a 10% e morbidade média de 50%. As complicações mais relatadas são fístulas intestinais e urinárias, infecções de sítio cirúrgico e fenômenos tromboembólicos. A sobrevida em 5 anos varia de 30 a 70%, com média de 50% nas maiores séries. Os critérios prognósticos mais importantes são, além da ressecção total ?R0? do tumor com margens cirúrgicas livres, a presença de metástases linfonodais, sobretudo extrapélvicas, e o comprometimento de parede pélvica lateral. Idade e índice de massa corpórea não devem ser considerados como fatores de risco isolados. A exenteração pélvica com intuito paliativo, apesar de indicação ainda discutível, pode ser considerada para alívio da sintomatologia local e consequente melhora na qualidade de vida. Portanto, quando realizada em pacientes cuidadosamente selecionadas, em instituições oncológicas com suporte multidisciplinar, pode oferecer controle da neoplasia pélvica em longo prazo.(AU)
Pelvic exenteration is a radical surgical treatment indicated as the treatment various malignant pelvic neoplasms. It consists of the removal of all organs affected by cancer, including diseasefree margins. treatment are the main indications, but it can also be the primary treatment of locally advanced gynecologic cancer. The procedure presents perioperative mortality of 5 to 10% and an average morbidity of 50%. The most commonly reported complications are intestinal and urinary fistulas, surgical site infections and thromboembolic phenomena. The 5-year survival ranges from 30 to 70%, averaging 50% in the larger series. The most important prognostic criteria are, in addition to the total ?R0? resection of the tumor with free surgical margins, the presence of lymph node metastases, especially extrapelvic, and the affection of the lateral pelvic wall. Age and body mass index should not be considered as isolated risk factors. Pelvic exenteration with palliative intent, although still a debatable indication, may be considered for relief of local symptoms and consequent improvement in quality of life. Therefore, when performed in carefully selected patients in oncological institutions with multidisciplinary support, it can provide the control of pelvic neoplasm in the long term.(AU)
Subject(s)
Humans , Female , Pelvic Exenteration , Genital Neoplasms, Female/surgery , Neoplasm Recurrence, Local/surgery , Indicators of Morbidity and Mortality , Databases, Bibliographic , Surgical Oncology/methodsABSTRACT
Objetivos: Avaliar a idade, o diâmetro do tumor primário, o estadiamento clínico, o tipo histológico,as porcentagens de recidiva local e a sobrevida de pacientes submetidas a tratamento conservadordo carcinoma invasivo inicial de mama na Universidade Federal de São Paulo (Unifesp).Métodos: Estudou-se, retrospectivamente, o prontuário de pacientes com câncer de mama submetidasa tratamento conservador, isto é, quadrantectomia com dissecção axilar e radioterapia, noperíodo de 1990 a 2002 na disciplina de Mastologia do Departamento de Ginecologia da Unifesp.Avaliou-se a idade, o diâmetro tumoral, o estadiamento clínico e as taxas de sobrevida e recidivalocal. Resultados: A idade variou de 23 a 88 anos, sendo a média de 53,7 anos. O diâmetro dotumor primário variou de 0,5 a 4 cm, sendo a média de 1,9 cm; 60,1% das pacientes estavamno estádio clínico I; 34,4% no estádio IIA; 4,9% no IIB e 0,6% no III. O tipo histológico maisfreqüente foi o ductal infiltrativo (83,1%), seguido do lobular (7,1%). A recidiva local foi diagnosticadaem 3,9% das pacientes e a sobrevida global no período médio de 44,5 meses foi de 97,3%.Conclusões: A cirurgia conservadora no câncer de mama inicial apresenta resultados semelhantesaos da cirurgia radical e os resultados do presente estudo foram comparáveis aos da literatura.
Purpose: To evaluate the age, the tumor size, the clinical stage, the histologic feature, survival and localrecurrence rates of the patients treated with breast conservation therapy in early breast cancer at FederalUniversity of Sao Paulo (Unifesp). Methods: A retrospective study of the patients medical records wasconducted. The patients selected for the study were those who had undergone breast conservation therapyfor early stage breast cancer, such as quadrantectomy with axillary dissection and radiotherapy, between1990 and 2002 at Mastology Discipline of Gynecology Department of Unifesp. The age, tumor size, clinicalstage, histologic type, survival and local recurrence rates were assessed and compared with data fromthe current literature. Results: The patients aged 23 to 88 years (median = 53.7). The tumor size was 0.5to 4.0 cm (median 1.9 cm); 60.1 percent of women were in stage I, 34.4% in stage IIA, 4.9% in IIB and0.6% in III. Concerning histologic feature, 83.1% were invasive ductal carcinoma and 7.1% lobularcarcinoma. The survival rate of 97.3 % and local recurrence rate of 3.9 in a 44.5 months of follow-up.Conclusions: The breast conservation therapy has become the method of choice for the treatment of earlystage breast carcinoma and our results were comparable with the literature.