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Revista Brasileira de Coloproctologia

version ISSN 0101-9880

Abstract

CARRICO, Luís Filipe Carvalho  and  MARTINS, Sandra Fátima Fernandes. Sensitivity of endorectal ecography in the staging of rectal chancre: correlation with pathological staging. Rev bras. colo-proctol. [online]. 2010, vol.30, n.4, pp.430-439. ISSN 0101-9880.  http://dx.doi.org/10.1590/S0101-98802010000400007.

OBJECTIVE: This study aimed to evaluate endorectal ultrasound sensibility, in our experience, in rectal cancer staging comparing with pathologic result. METHODS: A retrospective study between January 2005 and August 2009. We calculated sensibility, specificity, positive and negative predictive value for T and N. Through ROC curves we evaluated endoscopic ultrasound accuracy and through McNemar test we compared it with the anatomopathological result. RESULTS: Of 112 patients, 76 met the inclusion criteria. We obtained an efficiency of 75 to 97% for uT and 75% in uN. There was a sensibility, specificity, positive and negative predictive value, respectively of 63, 98, 92 and 89% for uT1, 71% and 76, 54 and 88 for uT2, 67, 81; 73 and 76% for uT3, 100, 97, 60 and 100% uT4, and 39, 91, 62 and 78% for uN. The ROC curves indicated that endorectal ultrasound is a good test for T staging and reasonable for N staging. The McNemar test revealed no significant differences between endoscopic ultrasound and histological staging (p>0.05). CONCLUSIONS: We concluded that endorectal ultrasound is an important tool in rectal cancer staging, showing a good correlation with histopathological results.

Keywords : Ultrasonography endorectal; Sensibility; Specificity; Positive predictive value; Negative predictive value; Pathological outcome.

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