Mastocytoma in a horse.
D000818:Animals; D002350:Carpus, Animal / Q000473:pathology*; D005552:Forelimb / Q000473:pathology*; D006734:Horse Diseases / Q000473:pathology*; D006736:Horses; D008297:Male; D008415:Mastocytosis / Q000473:pathology / Q000662:veterinary*