mesothelioma benign neoplasm benign fibrous mesothelioma fibrous mesothelioma, benign (morphologic abnormality) localized benign fibrous mesothelioma DOID:2653 A rare neoplasm, usually benign, derived from mesenchymal fibroblasts located in the submesothelial lining of the PLEURA. It spite of its various synonyms, it has no features of mesothelial cells and is not related to malignant MESOTHELIOMA or asbestos exposure. solitary fibrous tumor, pleural Editor note: consider merging into MONDO:0021041 UMLS:C0334511 MESH:D054363 benign fibrous mesothelioma fibrous mesothelioma, benign