Granular cell tumor (GCT) mimicking a nonsecreting anterior pituitary adenoma.

A 33-year-old male with right eye amaurosis and panhypopituitarism previously submitted to surgery and radiotherapy was admitted with a presumptive recurrence of a nonsecreting pituitary macroadenoma (the first diagnosis, in another service). Magnetic Resonance Imaging (MRI) confirmed an expansive solid isointense lesion in the posterior region of the sella with suprasellar component (Figure 1). After a new surgery, histological revealed granular cell tumor (GCT) (Figure 2). GCT of the CNS is rare1.This report emphasizes the importance of this differential diagnosis in preoperatory for solid lesions with suprasellar component, homogeneous enhancement, and hyperattenuated on CT since they are more vascular and tend to bleed more than macroadenomas2.