Rare ectopic colloid cyst of the pituitary stalk presenting with short stature and diabetes insipidus.

Ectopic colloid cysts are rare, benign, congenital lesions derived from the endoderm. They are most commonly located in the anterior portion of the third ventricle but can occasionally arise in the sellar/suprasellar region [1, 7, 12]. We report a pediatric patient with an ectopic colloid cyst presenting with short stature and central diabetes insipidus-a location not previously documented in children. Endoscopic endonasal transsphenoidal resection achieved subtotal removal with preservation of the pituitary stalk, and the patient remained symptom-free at 21-month follow-up.