Fig. 2
Patient 2. a T1-weighted magnetic resonance (MR) image with gadolinium 3 years after initial diagnosis showing a small sellar mass lesion. b Postoperative T1-weighted MR image indicating gross total removal of the tumor. c Preoperative roentgenogram of the fingers. d Preoperative roentgenogram of the face. e H&E staining (× 40 magnification) showing sheet-like proliferation of monomorphic round cells. f Immunohistochemical staining for growth hormone showing diffuse reactivity (× 40 magnification)