Cushing's disease of pituitary-dependent hyperadrenocorticism is common in
dogs and rare in cats. The cause is usually a pituitary cortocotroph adenom
a. Pituitary imaging with computed tomography is required to assess the siz
e and location of the pituitary adenoma in relation to the surgical landmar
ks. Microsurgical transsphenoidal hypophysectomy is an effective method of
treatment for canine and feline Cushing's disease.