obsolete_hairy cell leukemia true SCTID:118613001 ICD10:C91.40 ICD9:202.4 MESH:D007943 3.88.0 hairy cell leukemia http://purl.obolibrary.org/obo/MONDO_0018935 ICD10:C91.4 ONCOTREE:HCL ICDO:9940/3 NCIT:C7402 HCL-C Replaced by Mondo term MONDO_0018935, with which this term was previously merged. Use: http://purl.obolibrary.org/obo/MONDO_0018935 Hairy cell leukemia (HCL) is a rare type of leukemia in which abnormal B-lymphocytes are present in the bone marrow, spleen and peripheral blood. It is a slowly progressive chronic lymphocytic leukemia (CLL). The name comes from the abnormally shaped lymphocytes with hair-like projections. leukemic reticuloendotheliosis MedDRA:10019053 MedDRA:10019055 UMLS:C0023443 Orphanet:58017 EFO:1000956 classic hairy cell leukemia DOID:285 GARD:0006560 HCL