BACKGROUND<p style="text-align: justify;" data-mce-style="text-align: justify;">Central diabetes insipidus (CDI) is a common complication following transsphenoidal surgery for pituitary adenomas, but CDI as an initial presentation in pituitary adenomas is extremely rare. We report a case of a 67-year-old Filipino male with pituitary macroadenoma presenting as central diabetes insipidus, manifesting as a two-month history of severe frontotemporal headache, increased thirst, and polyuria, which was managed with desmopressin followed by transsphenoidal surgery. Three months postoperatively, the thyroid and adrenocorticotropic axis remained intact, and pituitary bright spot recovery was observed. He was clinically stable; hence, desmopressin was gradually tapered and discontinued. This case report presents a unique case of a pituitary adenoma that initially presented with central DI but later showed a complete resolution of symptoms along with the normalization of the "bright spot" seen on MRI, a hallmark of the posterior pituitary. Treatment options for preoperative CDI may include surgical or medical management, with some cases reported as self-limiting. However, the rarity of such cases underscores the urgent need for more clinical studies to fully understand the course of this condition. This case highlights a unique presentation of central diabetes insipidus in a pituitary macroadenoma and the possibility of complete resolution of symptoms coinciding with pituitary bright spot recovery post operatively.
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Adenoma ; Diabetes Insipidus ; Diabetes Insipidus, Neurogenic ; Neoplasms ; Pituitary Neoplasms ; Research Report