Malignant Leptomeningeal Neoplasm

**Semantic type:** Neoplastic Process

**Definition:** A primary or metastatic malignant tumor involving the leptomeninges.

**Synonyms:** - Malignant Leptomeningeal Tumor - Malignant Neoplasm of Leptomeninges - Malignant Neoplasm of the Leptomeninges - Malignant Tumor of Leptomeninges - Malignant Tumor of the Leptomeninges - leptomeningeal cancer