Cardiac fibrosarcoma in a dog.
A cardiac fibrosarcoma involving the right ventricular free wall, the interatrial septum, and proximal portion of the interventricular septum, with a 2-cm diameter protrusion into the right atrial lumen, was found at necropsy of a 2-year-old Miniature Schnauzer. Severe distortion of the tricuspid valve and narrowing of the aortic and pulmonic outflow tracts had caused the dog to develop right-sided cardiac failure and to have syncopal episodes. A tentative antemortem diagnosis of congenital pulmonic stenosis had been made on the basis of results of physical examination and diagnostic work-up. Evaluation of the case exemplifies the difficulty encountered in diagnosing cardiac tumors before the patient's death.
D000818:Animals; D004283:Dog Diseases / Q000473:pathology*; D004285:Dogs; D005354:Fibrosarcoma / Q000473:pathology / Q000662:veterinary*; D006338:Heart Neoplasms / Q000473:pathology / Q000662:veterinary*; D008297:Male