Pituicytoma: report of three cases with review of literature. 
Pituicytoma is a rare low-grade tumor (WHO Grade I) of pituicytes involving the sellar-suprasellar region, and originating from the specialized glial cells of the neurohypophysis.  Clinically and radiologically, they closely mimic pituitary adenoma or meningioma.  Diagnosis requires histopathological examination of the resected tissue.  This uncommon glial neoplasm is a rarity, with only 57 cases reported in the literature so far.  We report three cases of pituicytoma (aged between 7 and 24 years) presenting with reduced vision, headache and features of hypercortisolism in one case.  Radiologically, these lesions mimicked meningioma, hypothalamic chiasmatic glioma and pituitary microadenoma, respectively.  The second case is a 7-year-old girl, the youngest case on record.  Since this tumor is uncommon, it is frequently misdiagnosed.  Awareness of this entity is essential for planning management and treatment.  We present a brief review of all cases reported in the medical literature, and describe the clinical symptomatology, associated endocrinological abnormalities, imaging characteristics, behavior and outcome.