malignant mesothelioma sarcomatoid mesothelioma https://www.malacards.org/card/sarcomatoid_mesothelioma EFO:1000521 UMLS:C0334513 MEDGEN:137774 DOID:4488 GARD:0024401 NCIT:C45655 MONDO:0006407 sarcomatoid mesothelioma (morphologic abnormality) malignant fibrous mesothelioma (morphologic abnormality) sarcomatoid mesothelioma A diffuse malignant mesothelioma arising from the pleura and less often the peritoneum. It is characterized by the presence of spindle cells. Anaplastic morphologic features and multinucleated malignant cells may also be seen.