RESUMO CONTEXTO: Os distúrbios evacuatórios são prevalentes na população adulta e uma parcela significativa dos casos pode ter origem a partir de disfunções da musculatura do assoalho pélvico. A manometria anorretal (MAR) é importante ferramenta diagnóstica e pode guiar o tratamento conservador. OBJETIVO: Avaliar a prevalência de disfunção pélvica em pacientes com distúrbios de evacuação por meio de achados clínicos e manométricos e avaliar, usando os mesmos achados, se existem protocolos publicados que possam ser guiados pela MAR. MÉTODOS: Conduziu-se uma análise retrospectiva de um banco de dados prospectivo de 278 manometrias anorretais realizadas para investigação de distúrbios evacuatórios em pacientes do ambulatório de fisiologia anorretal do Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto, de janeiro de 2015 a junho de 2019. Os seguintes parâmetros foram calculados: pressão de repouso (RP), pressão de contração voluntária (PVC), canal anal funcional (CAF), sensibilidade retal (SR) e capacidade retal (CR). As medidas pressóricas e os gráficos manométricos foram revisados para elaboração do diagnóstico e para a proposição dos potenciais procedimentos de fisioterapia pélvica. Para comparação das variáveis contínuas e avaliação da igualdade entre variâncias, utilizou-se a análise de variância (ANOVA) e o teste exato de Fisher, entre os grupos de pacientes com incontinência fecal (IF) e constipação crônica (CC). Resultados com nível de significância menor que 0,05 (P-valor <0,05) foram considerados estatisticamente relevantes. Para análise estatística utilizou-se o programa IBM® SPSS® Statistics, versão 20. RESULTADOS: A idade média dos pacientes foi de 45±22 anos de idade, com predomínio do sexo feminino (64,4%) e economicamente inativo (72,7%). As indicações para a realização do exame foram IF (65,8%) e CC (34,2%). Pacientes com IF apresentaram menores valores de PR (41,9 mmHg x 67,6 mmHg; P<0,001), PCV (85,4 mmHg x 116,0 mmHg; P<0,001) CAF (1,49 cm x 2,42 cm; P<0,001), SR (57,9 mL x 71,5 mL; P=0,044) e CR (146,2 mL x 195,5 mL; P<0,001), quando comparados aos pacientes com CC. Nos pacientes com IF, o principal diagnóstico foi de ausência de canal anal funcional (49,7%). Em pacientes com CI, o principal diagnóstico foi de obstrução da via de saída (54,7%). Para pacientes com IF, o principal protocolo foi a associação do biofeedback anorretal (BFa) com estimulação do nervo tibial (ENT) (57,9%). Já nos pacientes com CC, o protocolo mais indicado foi o de BFa associado à ENT e treinamento com balão retal (54,7%). CONCLUSÃO: Observou-se elevada prevalência de alterações no assoalho pélvico de pacientes com distúrbios evacuatórios. Verificou-se elevado potencial para realização de fisioterapia do assoalho pélvico com base nos achados clínicos e manométricos.

ABSTRACT BACKGROUND: Evacuation disorders are prevalent in the adult population, and a significant portion of cases may originate from pelvic floor muscle dysfunctions. Anorectal manometry (ARM) is an important diagnostic tool and can guide conservative treatment. OBJECTIVE: To evaluate the prevalence of pelvic dysfunction in patients with evacuation disorders through clinical and manometric findings and to evaluate, using the same findings, whether there are published protocols that could be guided by anorectal manometry. METHODS: A retrospective analysis of a prospective database of 278 anorectal manometries performed for the investigation of evacuation disorders in patients seen at the anorectal physiology outpatient clinic of Hospital das Clínicas da Faculdade de Medicina de Ribeirão Preto between January 2015 to June 2019 was conducted. The following parameters were calculated: resting pressure (RP), squeeze pressure (SP), high-pressure zone (HPZ), rectal sensitivity (RS) and rectal capacity (RC). The pressure measurements and manometric plots were reviewed to determine the diagnosis and to propose potential pelvic physical therapy procedures. Analysis of variance (ANOVA) and Fisher’s exact test were used to compare the continuous variables and to evaluate the equality of variances between groups of patients with fecal incontinence (FI) and chronic constipation (CC). Results with a significance level lower than 0.05 (P-value <0.05) were considered statistically significant. Statistical analysis was performed using IBM® SPSS® Statistics version 20. RESULTS: The mean age of the sample was 45±22 years, with a predominance of females (64.4%) and economically inactive (72.7%) patients. The indications for exam performance were FI (65.8%) and CC (34.2%). Patients with FI had lower RP (41.9 mmHg x 67.6 mmHg; P<0.001), SP (85.4 mmHg x 116.0 mmHg; P<0.001), HPZ (1.49 cm x 2.42 cm; P<0.001), RS (57.9 mL x 71.5 mL; P=0.044) and RC (146.2 mL x 195.5 mL; P<0.001) compared to those of patients with CC. For patients with FI, the main diagnosis was the absence of a functional anal canal (49.7%). For patients with CC, the main diagnosis was outflow tract obstruction (54.7%). For patients with FI, the main protocol involved a combination of anorectal biofeedback (aBF) with tibial nerve stimulation (TNS) (57.9%). For patients with CC, the most indicated protocol was aBF combined with TNS and rectal balloon training (RBT) (54.7%). CONCLUSION: There was a high prevalence of pelvic floor changes in patients with evacuation disorders. There was a high potential for performing pelvic floor physical therapy based on the clinical and manometric findings.

Abstract Purpose To evaluate the gene expression of peroxisome proliferator activated receptors gamma (PPARG) in colorectal tumors and to correlate this data with clinical variables of the patients. Methods We analyzed the gene expression of PPARG in 50 samples of colorectal tumors using real-time reverse transcription polymerase chain reaction, and 20 adjacent normal tissue samples as control. The results of these quantifications were correlated with the respective patients’ medical records’ clinical information. Results PPARG expression was not different in the tumor tissue compared to the control tissue. Patients older than 60 years, histological type with mucinous differentiation, more advanced staging at the time of diagnosis, and patients who evolved with recurrence of the disease or death did not present higher PPARG expression. Conclusion Expression of PPARGD was not associated with worse prognosis.

RESUMO O câncer colorretal é a principal neoplasia maligna do trato gastrointestinal. Um melhor entendimento dos processos moleculares e celulares é necessário para o desenvolvimento de estratégias que permitam um diagnóstico precoce e um tratamento mais eficaz. Modelos que utilizam roedores são rápidos, reprodutíveis e permitem o estudo da sequencia adenoma-carcinoma de forma similar a encontrada em humanos. O objetivo desse manuscrito é revisar os principais modelos de carcinogênese química e os métodos mais usuais para avaliação dos resultados.

ABSTRACT Colorectal cancer is the leading cause of malignancy of the gastrointestinal tract. A better understanding of the molecular and cellular changes that lead to the disease is necessary to develop early diagnosis and optimal treatment modalities. Rodent models are rapid, reproducible and exhibit an adenoma-carcinoma sequence similar to that found in humans. The objective of this manuscript is to review the most common chemical carcinogens used to induce experimental tumors and the usual methods of evaluation.

PURPOSE: To describe a novel securing device for loop colostomies, developed in our institution and report our 10-year experience. METHODS: The T-shaped support device was used in all patients who required loop colostomy and who were at an increased risk of stoma withdrawal. The device was removed on the fifth postoperative day in all patients. An analysis from a prospective database regarding early postoperative complication, from 209 patients, was conducted between 2003 and 2013. RESULTS: Bleeding, peristomal skin problems, surgical site infection, stomal ischemia/necrosis, stenosis, obstruction, retraction and early withdrawal of the stoma were not noted in all cases. Thirteen patients (6%) reported mild discomfort on the site of the skin suture. Removal of the instrument was fast and easy, with the advantage of keeping the colostomy bag. CONCLUSION: The T-shaped bridge device successfully prevented stoma withdrawal in all subjects. The device was safe and well accepted, with minor complications.

PURPOSE: In this paper we report the oncological outcomes from clinical series of patients with rectal cancer submitted to local excision after neoadjuvant therapy and discuss the indications for local excision in partial clinical responders. METHODS: We analysed a prospective database of 39 patients submitted to a transanal endoscopic operation for rectal cancer after neoadjuvant chemoradiation between 2006 and 2015, comparing clinical and pathological variables, perioperative complications, recurrence rate and overall survival. RESULTS: We obtained 15.4% ypT0, 17.9% ypT1, 35.9% ypT2 and 28.2% ypT3. After a median follow-up of 24 months, tumoral recurrence was observed in 4 patients, one of them with isolated pulmonary metastasis. R0 resection was achieved in 79.5%, and postoperative complications were observed in 30.2% patients and no perioperative mortality occur. Compromise surgical margins do not affect recurrence rate, and 94.9% of patients are alive nowadays. CONCLUSION: Local excision could be associated with low recurrence rate and good overall survival. Short hospitalization time and low level of serious complications observed could be an interesting option for patients who would not tolerate a radical procedure or for those who declined a total mesorectal excision. A strict long-term follow-up must be warranted to detect early tumoral recurrence.