CNS 1

**Semantic type:** Classification

**Definition:** The status of central nervous system leukemia at diagnosis, where there is an absence of blasts on a cerebral spinal fluid cytospin preparation, regardless of the number of white blood cells.

**Synonyms:** - CNS1 - CNS1 - CNS1 - CNS1 - CNS1 - CNS1 - Central Nervous System Status 1