mu-heavy chain disease https://www.malacards.org/card/agammaglobulinemia https://www.malacards.org/card/mu_chain_disease mu-HCD mu chain disease mu heavy chain disease Mu-heavy chain disease (mu-HCD) is a type of HCD characterized by the production of incomplete monoclonal mu-heavy chains without associated light chains. The clinical presentation resembles that of patients with chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL). icd11.foundation:963887455 MEDGEN:66875 GARD:0019741 Orphanet:100024 ICD9:273.2 MONDO:0015044 UMLS:C0242310 DOID:0060128 NCIT:C3892 SCTID:61493004 heavy chain disease