Abstract
A spayed Labrador retriever, 13 years and 2 months old, was referred to our hospital because of intraabdominal mass and hemorrhage. By computed tomography, the mass was diagnosed as adrenal adenoma in the left, and it was removed surgically. Histopathological examination showed suspicion of an adrenal adenoma. Before surgery, alkaline phosphatase activity and total cholesterol were high, and diarrhea and anorexia continued after surgery. Serum cortisol concentration after injection of ACTH remained low. From these findings, this adrenal tumor was considered to be functional. Consequently its surgical removal was considered to have caused temporary adrenal insufficiency. The dog has been in good condition for 16 months until now.