title: A case report of an epidermal papilloma in Mustelus canis.
abstract: A white, raised mass present on the caudal fin of a smooth dogfish shark (Mustelus canis) was identified as an epidermal papilloma with areas suggestive of carcinoma in situ. When examined by electron microscopy no structures or particles of viral origin were apparent.
mesh_terms: D000818:Animals; D004284:Dogfish; D005393:Fish Diseases / Q000473:pathology*; D010212:Papilloma / Q000473:pathology / Q000662:veterinary*; D012754:Sharks; D012867:Skin / Q000473:pathology; D012878:Skin Neoplasms / Q000473:pathology / Q000662:veterinary*