[The endoscopic polypectomy of colonic polyps with invasive adenocarcinoma. A series of 19 cases].

We review the endoscopic polypectomies done at the "Juan Canalejo" Hospital in the last 6 years (1984-1989). Out of a 509 adenomatous polyps, 19 showed invasive adenocarcinoma seen in 18 patients (there were two carcinomatous polyps in one single patient), 11 men and 7 women. The median age was 67 years and all of them were located in the left side of the colon or the rectum. The average size was 3 cm and the most frequent histologic type was villoglandular (58%) followed by the villous (26%) and adenomatous (16%). The endoscopic resection was curative in all but one patient that presented vascular invasion in the resected polyp.