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Olfactory results of endoscopic endonasal surgery for pituitary adenoma: a prospective study of 143 patients
EANS Academy. Netuka D. Sep 27, 2019; 276132; EP04067
Abstract
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Background: Clinical examination, including pre- and postoperative assessment of olfaction function, should be included in evaluating surgical outcomes in patients with pituitary adenomas. A review of a recent series revealed a lack of assessment of olfaction in most of the studies. Validated tests should be used to assess olfactory dysfunction.
Methods: A prospective study with 143 patients who underwent surgical resection of pituitary adenomas from January 2014 to December 2017 was performed. Data on clinical presentation, pre- and postoperative neurologic, endocrinologic and ophthalmologic examinations, complications and follow-up outpatient examinations were recorded. Olfactory function was assessed using the Sniffin´ Sticks odor identification test preoperatively, postoperatively (3 months) and 1 year after surgery.
Results: Normosmia was present preoperatively in 93.7% of the patients, postoperatively in 95.8% and in 95.1% 1 year post-surgery. Hyposmia was present preoperatively in 4.2% of the patients, postoperatively in 2.1% and in 1.4% 1 year after surgery. Anosmia was present preoperatively in 2.1% of the patients, postoperatively in 2.1% and in 3.5% 1 year after surgery. In patients with preoperative normosmia postoperative hyposmia and anosmia were present in 1.5% of the patients. There were no differences according to age, gender of patients, size of pituitary adenoma and type of pituitary adenoma.
Conclusions: Assessment of olfactory function should be included in the analysis of pituitary adenomas surgery results. This prospective study showed low risk of olfaction deterioration if an endoscopic endonasal approach is used without any mucosal flaps for skull base reconstruction. Further studies that include objective olfaction assessment are warranted.
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