B Acute Lymphoblastic Leukemia, Not Otherwise Specified

**Semantic type:** Neoplastic Process

**Definition:** B acute lymphoblastic leukemias characterized by the absence of recurrent genetic abnormalities.

**Synonyms:** - B Acute Lymphoblastic Leukemia, NOS - B-ALL, NOS - B-ALL, Not Otherwise Specified - B-Acute Lymphoblastic Leukemia, NOS - B-Acute Lymphoblastic Leukemia, Not Otherwise Specified