Results of the lateral rhinotomy approach in transsphenoidal microsurgery for growth hormone-secreting pituitary adenoma

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Abstract
The results of transsphenoidal microsurgery for growth hormone (GH)-secreting pituitary adenomas in a series of 47 patients are presented. A modified transsphenoidal approach with lateral rhinotomy was employed for the access to the sphenoid sinus. Remission, defined as mean GH concentration less than 2.5 ng/ml, was achieved in 79% of the patients. Macroadenoma size of the tumour and a GH concentration more than 50 ng/ml were factors unfavourable for the outcome. The experience of the lateral rhinotomy approach in transsphenoidal surgery of acromegaly has been favourable. The distance from the incision to the sella is shorter than in rhinoseptal approaches, where the depth of the operative field is determined by the distance from the nasal spine to the sella. The lateral rhinotomy also allowed an exposure of the sella of adequate width in all patients. These aspects of the procedure facilitated adenoma removal.

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