What is your diagnosis? Tissue mass dorsal to the heart.
D000818:Animals; D002371:Cat Diseases / Q000000981:diagnostic imaging*; D002415:Cats; D008228:Lymphoma, Non-Hodgkin / Q000000981:diagnostic imaging / Q000662:veterinary*; D008297:Male; D011859:Radiography; D014134:Tracheal Neoplasms / Q000000981:diagnostic imaging / Q000662:veterinary*