obsolete_Peritoneal Well Differentiated Papillary Mesothelioma true EFO:1000469 3.88.0 peritoneal WDPM http://purl.obolibrary.org/obo/MONDO_0006364 UMLS:C1709507 NCIT:C45661 Replaced by Mondo term MONDO_0006364, with which this term was previously merged. Use: http://purl.obolibrary.org/obo/MONDO_0006364 peritoneal well differentiated papillary mesothelioma A localized or multifocal mesothelioma arising from the peritoneum. It predominantly occurs in women. It is characterized by the formation of papillae, covered by a single layer of blunt mesothelial cells. Mitotic figures are not present. There is no evidence of severe cytologic atypia. It has a relatively favorable clinical outcome, compared to diffuse malignant mesothelioma.