Pathologic significance of polyps of the rectum and colon

摘要: Since cancers and adenomatous polyps of the colon are indistinguishable except by histologic examination, all rectal lower sigmoidal polypoid tumors seen through a sigmoidoscope should be removed for examination. Juvenile (retention) usually require no further treatment. Adenomatous with focal atypia, carcinomain situ noninvasive cancer curable adequate local excision. Villous (papillary) adenomas so frequently contain invasive that they must resected as cancers. If tumor is entirely cancerous, radical resection performed.