Fig. 3
From: A rare case of bilateral cervical vagal neurofibromas: role of high-resolution ultrasound
Immunohistochemical staining (original magnification × 200) of NF1-associated neurofibroma showed positivity for S-100 protein (a, arrows), while GFAP (b) and Olig-2 (c) were negative. The Ki-67 labeling index (d, arrowheads) was low (<2%)