Monarch Disease Ontology term MONDO_0005872 (nervous system cancer) is a primary or metastatic malignant neoplasm involving the nervous system. Also known as: cancer of nervous system, malignant neoplasm of nervous system, malignant neoplasm of the nervous system, malignant nervous system neoplasm, malignant nervous system tumor, malignant nervous system tumour, malignant tumor of nervous system, malignant tumor of the nervous system.