Myelomatous Effusion in Multiple Myeloma.

Multiple myeloma (MM) is a systemic disease characterized by monoclonal proliferation of plasma cells. The clinical manifestations of the disease are due to tumour cell infiltration and monoclonal immunoglobulins and / or light chains secreted by the neoplastic cells. Effusions may develop in cases of multiple myeloma due to various causes but myelomatous effusion is uncommon. Moreover, multiple myeloma presenting as bilateral pleural effusion is exceptional and a case of multiple myeloma presenting with bilateral pleural effusion and anaemia is reported.