Primary peri-anal adenocarcinoma of intestinal type - a new proposed entity.

The name 'primary peri-anal adenocarcinoma of intestinal type' is proposed for this previously unrecognised subtype of perineal neoplasia. Awareness of its distinct existence - by recognising its intestinal morphology and immunophenotype while excluding metastasis from the intestinal tract - should help to collate data to determine its specific prognosis and to formulate its best management.