tumors originated mainly from the following sources : epidermis ( papillomas and basal cell neoplasms ) , pilosebaceous complexes of the anal region ( keratoacanthomas , cystic squamous cell tumors , and adenomas of the perianal sebaceous glands ) , and clitoral ( preputial ) glands ( adenomas and adenoacanthomas ) .
C0030354
papillomas
C0206720
squamous