Mixed Phenotype Acute Leukemia with Low Hypodiploidy in a Pediatric Patient. 2015

Elizabeth G Salazar, and Gerald B Wertheim, and Jaclyn A Biegel, and William Hwang, and Sarah K Tasian, and Susan R Rheingold
Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.

We describe the case of a 16 year-old female with mixed phenotype acute leukemia B/myeloid, NOS (formerly biphenotypic leukemia) with masked hypodiploidy and somatic TP53 and CDKN2A/B deletions. She achieved morphologic remission with lymphoid-directed multi-agent chemotherapy, but experienced an early medullary relapse 11 months from initial diagnosis. Her case details the unusual finding of hypodiploidy in a patient with ambiguous lineage leukemia and highlights the complexity of therapy selection for these high-risk patients.

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