An avian splenic myxoma.
D000818:Animals; D002645:Chickens; D008297:Male; D009232:Myxoma / Q000473:pathology / Q000662:veterinary*; D011201:Poultry Diseases / Q000473:pathology*; D013154:Spleen / Q000473:pathology; D013160:Splenic Neoplasms / Q000662:veterinary*