“…Various treatment modalities, including corticosteroids (2), interferon-a (3) and plasmapheresis (4), have proven to be limited or dubious benefit. Recently, we reported the efficacy of pentoxifylline (PTX) treatment in patients with HAM (5). Although PTXdownregulates inflammatory cytokine production, such as tumor necrosis factor-alpha (TNF-oc), interferon-gamma (IFN-y) and granulocytemacrophage colony stimulating factor (GM-CSF), in peripheral blood mononuclear cells of HAMpatients (6), the precise mechanismsby which PTXserves to ameliorate the motor disability in HAMare far from clear.…”