DO_rare_slim DO_cancer_slim NCIthesaurus chronic lymphocytic leukemia hairy cell leukemia MESH:D007943 A chronic lymphocytic leukemia that is characterized by over production of B cells (lymphocytes) by the bone marrow where the B cells appear hairy under a microscope. SNOMEDCT_US_2025_09_01:118613001 ICDO:9940/3 ICD9CM:202.4 UMLS_CUI:C0023443 NCI:C7402 ICD10CM:C91.4 DOID:285 GARD:6560 disease_ontology