A localized or multifocal mesothelioma arising from the peritoneum and less often the pleura. Cases arising from the peritoneum predominantly occur 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 malignant mesothelioma.

http://purl.obolibrary.org/obo/DOID_5884, http://purl.obolibrary.org/obo/NCIT_C7635, http://linkedlifedata.com/resource/umls/id/C1337012

well-differentiated mesothelial papillary tumor, benign/Intermediate mesothelioma, well-differentiated papillary tumor of the mesothelium, WDPM, well-differentiated papillary neoplasm of mesothelium, well-differentiated papillary neoplasm of the mesothelium, well-differentiated mesothelial papillary neoplasm, well differentiated papillary mesothelioma, well-differentiated papillary tumor of mesothelium

benign intermediate mesothelioma

MONDO:0003688