NCIt definition : A localized or multifocal mesothelial neoplasm 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.;