Protective Strategies for Pituitary Function During Endoscopic Transnasal Pituitary Adenoma Surgery: A Single-center Experience

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OBJECTIVE: This study investigated the impact of endoscopic transnasal pituitary adenoidectomy on function and discussed the factors that contribute to postoperative pituitary function. To provide a foundation for protecting pituitary function and improving the curative effect of pituitary adenoma neuroendoscope resection. METHODS: From January 2019 to January 2022, in the Neurosurgery Pituitary Tumor Diagnosis and Treatment Research Center, the First Affiliated Hospital of Shenzhen University, the clinical data of 306 patients who underwent endoscopic transnasal pituitary adenoma surgery were analyzed retrospectively. The surgical treatment strategy was discussed and explored, while the factors related to pituitary function were examined based on tumor size and Knosp grade. RESULTS: There were 40 cases (67.8%) of pituitary-thyroid axis, 18 cases (60%) of pituitary-adrenal axis, 25 cases (45.4%) of pituitary-gonad axis, 5 cases (62.5%) of pituitary-growth hormone axis, and 8 cases (72.7%) of diabetes insipidus with postoperative improves of hypopituitarism. Postoperative newly developed hypopituitarism occurred in 20 cases (8.1%) of pituitary-thyroid axis, 15 cases (5.4%) of pituitary-adrenal axis, 10 cases (4.0%) of pituitary-gonad axis, 5 cases (1.7%) of pituitary-growth hormone axis, and 8 cases (2.7%) of new diabetes insipidus. The incidence of pituitary-adrenal axis hypofunction in giant pituitary adenomas was significantly higher than that in microadenomas and macroadenomas ( P <0.05). The incidence of hypopituitarism of Knosp grade 4 pituitary adenoma before operation was higher than that of other groups ( P <0.05), but there was no significant difference in the incidence of new hypopituitarism after operation ( P >0.05). CONCLUSIONS: In endoscopic transnasal pituitary adenoma surgery, the incidence of hypothyroidism and adrenal gland dysfunction is higher than in other hormone axes, but the recovery rate is also higher, and the recovery rate of sex hormones is lower. The incidence of postoperative hypothyroidism increases dramatically with tumor size and tumor invasiveness.

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