Recurrent pneumonia in multiple myeloma due to acquired functional hypo-gammaglobulinaemia.
D000361:Agammaglobulinemia / Q000150:complications*; D006801:Humans; D009101:Multiple Myeloma / Q000150:complications*; D010950:Plasma Cells; D011014:Pneumonia / Q000209:etiology*
AGAMMAGLOBULINEMIA/complications; MYELOMA, PLASMA CELL/complications; PNEUMONIA/etiology and pathogenesis