[Peripheral neuropathy in large granular lymphocytic leukemia].

A 16-year old woman with LGL leukemia developed peripheral neuropathy. She showed virus-associated hemophagocytic syndrome (VAHS)-like signs including high fever, liver dysfunction, huge splenomegaly, hepatomegaly and pancytopenia. The presence of chronic active EB virus infection was proved by marked high titers for IgG and IgA antibodies to the Epstein-Barr viral capsid and early antigens and low titers of antibody to Epstein-Barr nuclear antigens. She showed dysesthesia and paresthesia of bilateral lower extremities with marked swelling and tenderness, and later developed muscular weakness and atrophy with areflexia of lower extremities. Findings of the central nervous system dysfunction were not observed except for the acceleration of jaw jerk. Pleocytosis and increased protein levels in the cerebrospinal fluid were found. Pulse therapy of methyl-prednisolone and high dose intravenous immunoglobulin therapy (20 g/day for 3 days) were effective for neurological findings. The increased neopterin in the cerebrospinal fluid suggested that peripheral neuropathy was caused by activated macrophages.