MUCINOUS ANAL GLAND CARCINOMA WITH PERIANAL PAGETOID SPREAD

We report a case of well differentiated perianal mucinous carcinoma wi th associated dysplasia of the adjacent anal gland epithelium. Anal gl and dysplasia is only rarely demonstrable histologically in Gases of a denocarcinoma of suspected anal gland origin. The tumor was not associ ated with chronic perianal abscess or fistula formation, which had bee n regarded as important in the pathogenesis of perianal mucinous carci noma. There was associated, clinically unsuspected Pegetoid intra-epid ermal spread of adenocarcinoma in the perianal skin.