Figure 3 (A,B).

Orbital neurofibroma. A 3-year-old boy had proptosis since birth and multiple café-au-lait spots. T2W axial image (A) shows a large intraorbital mass (arrow). In addition, multiple areas of increased signal intensity (arrowheads) are seen in the pons and both middle cerebral peduncles (representing “neurofibromatosis bright objects”). CISS image (B) shows normal thickness of the optic nerve (arrow) and of the CSF sheath around it, excluding an optic nerve origin for the tumor. These findings are in keeping with a diagnosis of plexiform neurofibroma rather than optic glioma