disease has location neoplasm peritoneal neoplasm tumour of peritoneum tumor of peritoneum peritoneum tumour MESH:D010534 MedDRA:10061344 UMLS:C0031149 MEDGEN:18392 EFO:1001100 peritoneal neoplasm MONDO:0006901 peritoneum tumor neoplasm of peritoneum peritoneum neoplasm SCTID:126865007 A benign or malignant neoplasm that affects the peritoneal cavity. Representative examples of benign neoplasms include adenomatoid tumor and disseminated peritoneal leiomyomatosis. Representative examples of malignant neoplasms include primary peritoneal carcinoma, metastatic carcinoma to the peritoneum, and malignant mesothelioma. peritoneum neoplasm (disease) NCIT:C3322 peritoneum