Monarch Disease Ontology id MONDO_0006380 (pleural sarcomatoid mesothelioma) can be described as follows. Malignant mesothelioma that arises from the pleura and is characterized by the presence of spindle-shaped cells forming fascicles, or that are distributed haphazardly resembling a sarcoma. Also known as: pleura sarcomatoid mesothelioma, sarcomatoid mesothelioma of pleura.