PMID: 11917445Mar 29, 2002Paper

Prevalence of adenomas and carcinomas of the colon. Results of the rectosigmoid exam

Revista de gastroenterología de México
E de Lascurain-Morhan

Abstract

Colon adenomas are precursors for colon carcinoma. Their prevalence has been estimated at 20-30% in the general population and 40-60% in developed countries. They are classified as tubular, villous; or mixed, and as low- or high-risk lesions, which have any of the following characteristics: Being larger than 1 cm; having a villous component, or showing moderate to severe dysplasia. To analyze the results of a series of colonoscopies, carried out from 1993 to 1999 in a private hospital in Mexico City, with regard to the following: Prevalence of colon adenomas and carcinoma prevalence in different age groups, distribution by gender; frequency of single vs synchronous lesions; presence or absence of distal and/or proximal lesions as markers of neoplasia and finally, prevalence of proximal lesions in the absence of distal lesions. A retrospective analysis of a database of 701 colonoscopies, which the author carried out from January 1993 to December 1999. The prevalence of colon adenoma was 14.69%. The prevalence of high-risk adenomas or carcinoma was 6.7%. In 29.72% of the cases, there were concurrent lesions. These were more common in male patients. The probability of finding a proximal lesion where there was a distal adenoma was ...Continue Reading

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