 The patient was placed on prednisone. Temporal artery biopsy showed no evidence of vasculitis. MRI scan could not be obtained due to patient weight. Sellar CT was done instead: coronal sections revealed sellar enlargement and upward bowing of the diaphragm sella suggesting a pituitary mass. In retrospect sellar enlargement could be seen on the angiogram X-rays. Differential consideration was given to cystic pituitary adenoma, noncalcified craniopharyngioma, or Rathke's cleft cyst with solid component. The patient refused surgery. He was seen in Neuroopthalmology Clinic 2/18/93 and was found to have mild recovery of vision OS and improved visual fields. Aberrant reinnervation of the 3rd nerve was noted as there was constriction of the pupil (OS) on adduction, downgaze and upgaze. The upper eyelid, OS