Transsphenoidal adenomectomy in Cushing's disease via a lateral rhinotomy approach. 
Cushing's disease may be treated by surgical pituitary adenomectomy.  We present a surgical approach to the pituitary gland that increases the possibilities of a selective adenomectomy, and compare our results with those of other studies.  A retrospective study of patients with Cushing's disease undergoing transsphenoidal selective adenomectomy via a lateral rhinotomy at Sahlgrenska University Hospital from 1984-93 is presented.  Thirty-one patients (26 women, five men; mean age: 44 years, range: 13-75 years) with Cushing's disease were followed for a median time of 4.5 years after operation (range: 1-10 years).  Preoperative and postoperative urinary and serum cortisol, and circadian rhythm of serum cortisol were measured.  We also measured serum TSH, T4, PRL, FSH, LH, and testosterone as well as urine and plasma osmolality.  Our remission rate was 77% and the recurrence rate 3%.  Hormonal insufficiency was rare.  Hypothyroidism and hypogonadism were present in 3% of the patients, and diabetes insipidus occurred in 6% of the patients.  Selective adenomectomy with its good opportunities for cure and improvement should be regarded as the treatment of choice for Cushing's disease.  Using the lateral rhinotomy approach to the sphenoidal cavity results in good accessibility to the sella turcica and its pituitary adenomas, a low frequency of postoperative pituitary insufficiency, and a high remission rate.