title: Pyoderma gangrenosum with a monoclonal IgM red cell agglomerating factor.
mesh_terms: D000368:Aged; D001796:Blood Protein Disorders / Q000150:complications* / Q000276:immunology; D002449:Cell Aggregation; D004912:Erythrocytes / Q000276:immunology*; D006801:Humans; D007122:Immunoelectrophoresis; D007075:Immunoglobulin M / Q000032:analysis*; D008297:Male; D011711:Pyoderma / Q000150:complications* / Q000276:immunology; D012883:Skin Ulcer / Q000150:complications* / Q000276:immunology
chemical_list: D007075:Immunoglobulin M