title: Teratoma in a duck.
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000473:pathology*; D004372:Ducks; D008297:Male; D013724:Teratoma / Q000473:pathology / Q000662:veterinary*; D013736:Testicular Neoplasms / Q000473:pathology / Q000662:veterinary*