Concurrent acute myeloid leukemia with inv(16)(p13.1q22) and chronic lymphocytic leukemia: molecular evidence of two separate diseases.

Published

Journal Article

Acute myeloid leukemia (AML) occurring concurrently with or after untreated chronic lymphocytic leukemia (CLL) is rare. We report a case of a 59-year-old man who was evaluated for anemia, thrombocytopenia, and leukocytosis with circulating blasts. On the basis of the morphology and immunophenotyping results, a preliminary diagnosis of chronic myelomonocytic leukemia with concurrent CLL was considered. Subsequently, cytogenetic analysis of the leukemic blood specimen revealed inv(16)(p13.1q22) with secondary trisomy 22 in a sideline clone. Fluorescence in situ hybridization confirmed the CBFbeta rearrangement associated with inv(16) in myeloblasts and myelomonocytic cells, but not in CLL cells. Therefore, a final diagnosis of AML with inv(16) with concurrent CLL was made. After standard chemotherapy for AML, the patient achieved complete remission for both his AML and CLL. The unique aspects of this case include concomitant AML and CLL, which do not share clonality, complex cytogenetic abnormalities with trisomy 22 as a secondary abnormality associated with inv(16), and achievement of remission for both AML and CLL by AML chemotherapy regimen. This case also represents one of the rare instances where a diagnosis of AML can be established even when the blast percentage in the marrow and blood is less than 20%.

Full Text

Duke Authors

Cited Authors

  • Lu, CM; Murata-Collins, JL; Wang, E; Siddiqi, I; Lawrence, HJ

Published Date

  • December 2006

Published In

Volume / Issue

  • 81 / 12

Start / End Page

  • 963 - 968

PubMed ID

  • 16917916

Pubmed Central ID

  • 16917916

International Standard Serial Number (ISSN)

  • 0361-8609

Digital Object Identifier (DOI)

  • 10.1002/ajh.20716

Language

  • eng

Conference Location

  • United States