obsolete_Peritoneal Multicystic Mesothelioma true A cystic mesothelioma that arises from the peritoneum and usually affects young to middle aged females. Grossly, it presents as a large multiloculated tumor mass, usually in the pelvic peritoneum. Histologically it is characterized by the presence of multiple cysts that are lined by one or more layers of mesothelial cells that do not show atypia. Patients usually present with abdominal or pelvic mass and pain. The clinical course is indolent. The tumor may recur, but transformation to diffuse malignant mesothelioma is rare. ICD10:C45.1 multilocular peritoneal inclusion cysts Replaced by Mondo term MONDO_0006363, with which this term was previously merged. Use: http://purl.obolibrary.org/obo/MONDO_0006363 multilocular peritoneal cysts benign multicystic peritoneal mesothelioma multilocular peritoneal inclusion cyst multicystic mesothelioma of peritoneum 3.88.0 NCIT:C6536 GARD:0010777 multicystic mesothelioma multicystic mesothelioma of the peritoneum http://purl.obolibrary.org/obo/MONDO_0006363 benign cystic peritoneal mesothelioma peritoneal multicystic mesothelioma BMPM UMLS:C1334818 peritoneal cystic mesothelioma SCTID:716650003 Orphanet:168816 EFO:1000468