Parapituitary meningioma in a dog with pituitary-dependent hyperadrenocorticism

A dog with constitutional and cutaneous signs of hyperadrenocorticism had central visual impairment caused by an intracranial mass. Irradiation of the presumed pituitary mass did not improve the dog's condition. At necropsy, the intracranial mass was not of pituitary origin, but rather, was a parapituitary meningioma.