Acute Mast Cell Leukemia Associated With T(4;5)(Q21;Q33)

Keywords

Basophilia; Mast cell leukemia; PRKG2/PDGFRB fusion gene; Systemic mastocytosis; Tyrosine kinase inhibitor

Abstract

To the best of our knowledge, this manuscript describes clinical and pathologic findings of the first case of acute mast cell leukemia harboring t(4;5)(q21;q33), compatible with fusion of the PDGFRB gene to a rare partner, PRKG2. Translocation involving the PDGFRB gene is confirmed by fluorescence in situ hybridization study. This case presented a relatively fulminant clinical course with acute mast cell leukemia and “C” findings (cytopenia, hepatosplenomegaly, and weight loss), mast cell sarcoma, and severe basophilia. Despite aggressive presentation initially, the patient responded well to tyrosine kinase inhibitor treatment and is currently in complete remission 33 months after diagnosis. This case significantly extends the disease spectrum associated with PRKG2/PDGFRB fusion gene. Recognizing the whole spectrum of diseases associated with this fusion is critical because tyrosine kinase inhibitor treatment has been exceedingly effective in these patients.

Publication Date

9-1-2017

Publication Title

Human Pathology

Volume

67

Number of Pages

198-204

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.humpath.2017.03.014

Socpus ID

85028947256 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85028947256

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