Intravascular lymphoma simulating vasculitis.

The case history of a patient with intravascular lymphoma (IL) is reported. Signs of a systemic illness including fever, muscular weakness, telangiectasias, nephrotic syndrome, and neurologic manifestation suggested vasculitis. Cyclophosphamide treatment produced almost complete remission, but the patient died of respiratory failure 13 months after presentation due to lung involvement. The diagnosis was not revealed until postmortem examination. The differential diagnosis of IL is provided.