Malignant Leptomeningeal Neoplasm, also known as malignant leptomeningeal tumor, is related to phakomatosis cesioflammea and mixed cell uveal melanoma. An important gene associated with Malignant Leptomeningeal Neoplasm is GNAQ (G Protein Subunit Alpha Q), and among its related pathways/superpathways are Beta-Adrenergic Signaling and Endometrial cancer. Affiliated tissues include brain and breast, and related phenotypes are pigmentation and normal