[Nelson's syndrome. A case report (author's transl)].

Two cases of Nelson syndrome with typical clinical and laboratory features are presented. Both had radiological evidence of pituitary tumor; in one case it was evident on the plain film while in the other one it was better appreciated by means of tomography. It is important in the post-surgery follow-up of patients who underwent bilateral adrenectomy for Cushing's disease a periodical evaluation of skin pigmentation, visual field width and sellar morphology for the early detection of a pituitary adenoma.