Optic Perineuritis Presenting as the Initial Manifestation of Central Nervous System Involvement in Rai Stage 0 Chronic Lymphocytic Leukemia.

Background: To describe the first case of optic perineuritis because of meningeal involvement of early stage chronic lymphocytic leukemia (CLL).

Methods: A case report and review of the literature.

Results: A case of unilateral optic neuropathy associated with enhancement of the optic nerve sheath is described in a patient with a prior 2-year history of Rai Stage 0 CLL.