Visual disturbance as initial presentation of hairy cell leukemia.

PURPOSE Hairy cell leukemia (HCL) is a rare disorder that occasionally has visual symptoms after diagnosis. The authors present a case of HCL in which bilateral visual symptoms led to the initial diagnosis. METHODS Observational case report. RESULTS Bilateral decreased vision to 20/30 in the right eye and 20/40 in the left due to intraretinal and preretinal hemorrhages with no other systemic signs or symptoms prompted a hematologic evaluation in which HCL was found to be the causative disorder in a previously healthy 41-year-old man. CONCLUSIONS The authors present a rare case in which bilateral visual complaints led to the diagnosis of HCL. Thus, though uncommon, HCL should be considered in the differential diagnosis of otherwise unexplained retinal hemorrhages.