NCIthesaurus diencephalic neoplasm thalamic neoplasm DOID:6098 DOID:6096 UMLS_CUI:C0346902 NCI:C4576 NCI:C6221 SNOMEDCT_US_2025_09_01:188287005 UMLS_CUI:C1336733 disease_ontology malignant neoplasm of thalamus malignant tumor of Thalamus tumor of Thalamus