Cup-like Blasts in 2 Pediatric Patients With NPM-1-Positive Acute Myeloid Leukemia

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Abstract

Cup-like phenotype is defined in some subtypes of acute myeloid leukemia (AML) and have been associated with NPM-1 and/or FLT3-ITD positivity in the presence of normal karyotype in >60% of patients. Herein we present two pediatric AML-M1 patients with cuplike nuclear morphology and NPM-1 positivity. Both patients were negative for FLT3-ITD mutation. NPM-1 mutation and FLT3-ITD mutation should be kept in mind in AML patients with cup-like blast morphology as these two mutations are important molecular markers for prognosis, risk group classification and also for response to treatment.

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