disease has location cancer retroperitoneal cancer retroperitoneal neoplasm retroperitoneal space cancer MEDGEN:57559 cancer of retroperitoneal space tumour of retroperitoneum malignant tumour of peritoneum and retroperitoneum neoplasm of retroperitoneum icd11.foundation:1731312506 UMLS:C0153465 ICD9:158 SCTID:126872008 tumor of retroperitoneum A primary or metastatic malignant neoplasm involving the retroperitoneum. The vast majority of cases are carcinomas, lymphomas, or sarcomas. malignant neoplasm of retroperitoneum neoplasm of the retroperitoneum malignant retroperitoneal space neoplasm malignant neoplasm of retroperitoneum and peritoneum NCIT:C3537 malignant retroperitoneal neoplasm MONDO:0005941 MESH:D012186 DOID:5875 ICD9:158.0 EFO:0007466 malignant neoplasm of retroperitoneal space retroperitoneal neoplasm retroperitoneal space