Teaching NeuroImages: Craniofacial fibrous dysplasia: Loss of vision after head trauma

A 24-year-old woman presented with blurred vision of her left eye 1 hour after a mild head trauma. Examination revealed left-sided exophthalmos and left side 20/40 vision with relative afferent pupillary defect. CT (figure 1) and MRI scan (figure 2) revealed ground-glass bone abnormalities involving the left frontal, orbital, and sphenoidal bones causing compression of the left optic nerve, all pathognomonic of fibrous dysplasia (FD). FD is a rare slowly progressive benign disorder where normal bone is replaced with abnormal fibrous tissue.1 IV methylprednisolone was given to treat supposed posttraumatic edema around the left optic nerve. The patient's vision normalized.
Source: Neurology - Category: Neurology Authors: Tags: CT, All Clinical Neurology, Optic nerve, Visual loss, Brain trauma RESIDENT AND FELLOW SECTION Source Type: research