title: Acquired C1 esterase deficiency with cold agglutinin disease associated with monoclonal IgM antibodies.
mesh_terms: D000368:Aged; D000373:Agglutinins; D003080:Cold Temperature; D003174:Complement C1 Inactivator Proteins / Q000172:deficiency*; D006801:Humans; D007075:Immunoglobulin M; D008297:Male; D010265:Paraproteinemias / Q000276:immunology*
chemical_list: D000373:Agglutinins; D003174:Complement C1 Inactivator Proteins; D007075:Immunoglobulin M