title: Diagnostic imaging in canine pheochromocytoma.
abstract: The diagnosis of pheochromocytoma is challenging due to the variable presentations of patients affected with this neoplasm. This report describes four dogs with pheochromocytoma in which radiography, ultrasonography and computed tomography (CT) were key diagnostic tools. Computed tomography was the most useful imaging modality for assessment of size, shape and margination of the tumor. CT findings for the pheochromocytoma included a large, irregularly shaped mass in the dorsal midabdomen with multiple foci of low attenuation dispersed in hyperdense, highly vascular tissue. This neoplasm often invades the caudal vena cava and other surrounding organs therefore, although a pheochromocytoma may be identified in the absence of clinical signs, it should not be considered an incidental lesion. The unpredictable growth rate and potential for invasion of major vessels warrants serious consideration. Follow-up ultrasound and CT examinations are recommended for patients with adrenal masses that do not undergo surgical excision.
authors.affiliation: Department of Small and Large Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing 48824-1314, USA.
authors.forename: D S
authors.initials: DS
authors.lastname: Rosenstein
mesh_terms: D000310:Adrenal Gland Neoplasms / Q000000981:diagnostic imaging / Q000662:veterinary*; D000818:Animals; D003937:Diagnosis, Differential; D004283:Dog Diseases / Q000000981:diagnostic imaging*; D004285:Dogs; D005260:Female; D008297:Male; D010673:Pheochromocytoma / Q000000981:diagnostic imaging / Q000662:veterinary*; D014057:Tomography, X-Ray Computed / Q000662:veterinary; D014463:Ultrasonography