Revista chilena de cirugía
versión On-line ISSN 0718-4026
GARCIA-HUIDOBRO D, MARÍA ANGÉLICA et al. Rectal endosonography to detect occult carcinoma in villous adenoma. Rev Chil Cir [online]. 2008, vol.60, n.4, pp. 310-314. ISSN 0718-4026. http://dx.doi.org/10.4067/S0718-40262008000400008.
Background: Thirty to forty percent of villous adenomas can be an occult carcinoma. Even biopsy can miss the diagnosis. Rectal endosonography can be useful to detect these malignant tumors. Aim: To assess the usefulness of rectal endosonography to detect invasive carcinoma and eventual lymph node involvement in villous adenomas. Material and methods: Retrospective review of 1400 rectal endosonographies performed between years 2000 and 2006. Those cases in which a rectal villous adenoma was informed, that were subjected to surgical excisión and that had a pathology report were included in the study. Results: Thirty five rectal endosonographies were informed as rectal villous adenoma and 28 had a pathology report. In 17 of the latter, an invasive carcinoma was detected on pathology. The concordance between pathology and rectal endosonography to detect the carcinoma was 82%. Positive and negative predictive valúes, sensitivity and specificity of endosonography to detect carcinoma were 100, 69, 71 and 100% respectively. The concordance to differentiate T0-T1 lesions from deeper lesions and to detect lymph node involvement was 75 and 84% respectively. Conclusions: Rectal endosonography is useful to detect carcinomas in villous adenoma and to determine the stage of such tumors
Palabras clave : Villous adenoma; rectal endosonography; colon cancer.