Central Nervous System Melanocytic Neoplasm

**Semantic type:** Neoplastic Process

**Definition:** A melanocytic neoplasm that arises from the leptomeninges. This category includes diffuse proliferative processes (melanocytosis and melanomatosis) and circumscribed processes (melanocytoma and melanoma).

**Synonyms:** - CNS Melanocytic Neoplasm - CNS Melanocytic Tumor - Central Nervous System Melanocytic Tumor - Primary Central Nervous System Melanocytic Neoplasm - Primary Central Nervous System Melanocytic Tumor - Primary Meningeal Melanocytic Neoplasm - Primary Meningeal Melanocytic Tumor