A primary atypical solitary fibrous tumor of the sella mimicking nonfunctional pituitary adenoma: a case report.

We reported a 32-year-old male with a sellar solitary fibrous tumor who presented with headache and affliction in the left eye. Serum biochemical examination revealed hypoglycemia. The tumor was assumed to be a nonfunctional pituitary adenoma preoperatively. A subtotal resection of the tumor was performed. Immunohistochemically, atypical solitary fibrous tumor was established. The residual tumor had no progression or distant metastasis at a 44-month follow-up after gamma-knife stereoradiotherapy.