Headache and Neurological Deficits with Cerebrospinal Fluid Lymphocytosis in a Helicopter Pilot

This patient's transient episodes were consistent with HaNDL syndrome. His symptom resolution involving three episodes within 25 d reflects the transient nature of this condition. It is critical to recognize HaNDL syndrome as a benign, monophasic disorder that resolves within a maximum of 3 mo so that future pilots with a recent history of HaNDL syndrome may safely and expeditiously return to work. Wetmore EL, Haddon R, Robertson CE, Cowl CT, Elkhatib WY, Garza I. Headache and neurological deficits with cerebrospinal fluid lymphocytosis in a helicopter pilot. Aerosp Med Hum Perform. 2025; 96(10):936-939.