Fibrous Dysplasia

Fibrous Dysplasia
Fibrous dysplasia, craniosynostosis, mucopolysaccharidosis and
osteopeterosis can cause optic foraminal narrowing and optic atrophy.
Sometimes, these compressions can be unilateral or asymmetrical. In the
case of craniosynostosis, intracranial pressure may be elevated and
papilledema can of itself cause optic atrophy.
Digre, Corbett
A young man with a right optic neuropathy -- notice the difference between
the two discs -- (OD--A; OS--B) from compression of the right optic canal due
to fibrous dysplasia shown here with CT axial (C) and coronal (D).
The arrows point to dysplastic bone of
the optic canal
Top: axial CT, bone windows
Bottom: coronal CT