Gallbladder mucocele in a 12-year-old cocker spaniel

A 12-year-old, spayed cocker spaniel was presented for panting behavior which had increased over the past several months. A diagnosis of hyperadrenocorticism was made, and ultrasound imaging revealed the presence of a gallbladder mucocele. While often an incidental finding, gallbladder mucoceles can have consequences and require intervention. The etiology, diagnosis, and management of gallbladder mucoceles are discussed.