Pituitary adenoma causing visual disturbances in a 6-year-old girl.

Pituitary adenomas rarely occur in young children, typically present with systemic symptoms, and rarely undergo malignant transformation. We report a 4-year-old girl who presented with visual disturbances initially diagnosed and treated as amblyopia. She subsequently developed headaches and a gait disturbance and was discovered to have a large, suprasellar, nonsecreting pituitary adenoma. The tumor was resected, but 22 months later she developed recurrence with malignant transformation.