Optic nerve sheath fenestration for intracranial hypertension associated with chronic inflammatory demyelinating polyneuropathy.

The authors report a case of papilledema in a 61-year-old woman with chronic demyelinating polyneuropathy. The cerebrospinal fluid protein level was elevated (2.68 to 4.51 g/L), as was the cerebro-spinal fluid opening pressure (27 to 40 cm H2O). A unilateral optic nerve sheath fenestration proved to be effective in preserving vision, and the papilledema resolved completely.