title: Acute myelogenous leukemia concurrent with untreated chronic lymphocytic leukemia.
abstract: We report a case of acute myelogenous leukemia (AML) concurrent with untreated chronic lymphocytic leukemia (CLL). An 84-year-old Japanese man was admitted to the Chihaya Hospital with persistent high-grade fever. Morphologic observation of peripheral blood and bone marrow smears revealed a proliferation of blasts and lymphocytosis with small and mature phenotypes. Immunophenotyping of the blast cells revealed CD13+, CD33+, CD34+, and HLA-DR+, and that of the lymphocytes revealed CD5+, CD19+, CD20+, and lambda+ on the cell surface. The peripheral lymphocytes revealed an IgH gene rearrangement. Chromosome analysis of 20 metaphase cells from bone marrow showed numerous abnormalities, containing +8,+11,+21. The patient's disease was diagnosed as AML with trilineage dysplasia concurrent with CLL. The simultaneous occurrence of AML and CLL is extremely rare but should not be overlooked as a possible underlying cause of lymphocyte abnormalities in AML patients.
authors.affiliation: Department of Internal Medicine, Chihaya Hospital, Fukuoka City, Japan.
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Muta
authors.forename: Takashi
authors.initials: T
authors.lastname: Okamura
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Niho
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001854:Bone Marrow Cells / Q000473:pathology; D015321:Gene Rearrangement; D005803:Genes, Immunoglobulin; D006801:Humans; D016130:Immunophenotyping; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000150:complications* / Q000175:diagnosis; D015470:Leukemia, Myeloid, Acute / Q000150:complications* / Q000175:diagnosis; D008214:Lymphocytes / Q000473:pathology; D008297:Male