Extramammary Paget's disease of the anus.
D000368:Aged; D001005:Anus Neoplasms / Q000209:etiology / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D010145:Paget Disease, Extramammary / Q000209:etiology / Q000473:pathology*