Effective treatment with mitotane for a canine case of presumed ectopic Cushing's syndrome-related pheochromocytoma.

Background: In humans, ectopic Cushing's syndrome (ECS) is characterized by hypercortisolemia, which is caused by small lung carcinoma, bronchial carcinoids, and pheochromocytoma. In dogs, only a few cases of ECS associated with pheochromocytoma have been reported to date.

Case Description: Herein, we describe a canine case of malignant pheochromocytoma that is presumed to be the cause of ECS.