Spall B, Chen AV, Tucker RL, et al.
A 10-year-old Akita mix became acutely paraplegic. Upon magnetic resonance imaging, multiple, slightly T2-hyperintense, T1-isointense extradural masses, relative to spinal cord were found in the vertebral canal. The retroperitoneal masses had mixed T2-signal intensity. The contrast enhancement pattern for the spinal masses was both homogenous and heterogenous. The diagnosis was metastatic pheochromocytoma. Signal intensity of the tumors in this dog was similar to reports of pheochromocytoma in human beings.