Mixed Phenotype Acute Leukemia, B/T

**Semantic type:** Neoplastic Process

**Definition:** A very rare mixed phenotype acute leukemia in which the blasts show clear-cut evidence of both B-cell and T-cell lineage but are negative for KMT2A rearrangement and t(9;22)(q34;q11.2) translocation.

**Synonyms:** - MPAL-B/T - Mixed Phenotype Acute Leukemia, B/T, NOS - Mixed Phenotype Acute Leukemia, B/T, NOS - Mixed Phenotype Acute Leukemia, B/T, Not Otherwise Specified - Mixed Phenotype Acute Leukemia, B/T, Not Otherwise Specified