• A Scott Emmert, Ahmed E Hussein, Olesia Slobodian, Bryan Krueger, Ruchi Bhabhra, Matthew C Hagen, Sarah Pickle, and Jonathan A Forbes.
• Department of Neurosurgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA.
• World Neurosurg. 2021 Jan 1; 145: 448453448-453.

BackgroundThere is a paucity of information in the literature linking possible neuroendocrinologic repercussions of anterior pituitary insufficiency from tumor-associated mass effect with gender identity in transindividuals. The authors present the case of a 26-year-old transgender woman who was found to have a sellar/suprasellar neoplasm after reporting loss of vision in a bitemporal distribution.Case DescriptionMagnetic resonance imaging demonstrated a 2.6-cm complex cystic and solid sellar/suprasellar mass, suggestive of craniopharyngioma, intimately associated with the pituitary stalk. Importantly, this radiographic diagnosis was made 2 years following the initiation of gender-affirming hormone therapy (HT). Laboratory testing following radiographic diagnosis demonstrated evidence of diffuse anterior pituitary insufficiency with decreased morning cortisol, free thyroxine, insulin-like growth factor-1, and testosterone. Following optimization with the endocrinology team, the patient was taken to the operating room for expanded endonasal resection of tumor with lumbar drain insertion and nasoseptal flap coverage. Gross total resection was achieved with marked improvement in vision noted following surgery. The patient continued her HT following surgery.ConclusionsIn hindsight, the neuroendocrinologic manifestations of the craniopharyngioma may have influenced distressing pubertal experiences that distanced her from her assigned male sex, as well as the desired effects of feminization HT in this patient, ultimately delaying her presentation to the neurosurgery service and diagnosis of craniopharyngioma. As the first report of the neurosurgical evaluation and treatment of a transgender patient with anterior pituitary insufficiency secondary to craniopharyngioma, this case examines the biopsychosocial interplay between the development of gender identity and the neuroendocrinologic manifestations of craniopharyngioma.Copyright © 2020 Elsevier Inc. All rights reserved.

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