Monarch Disease Ontology entry MONDO_0021350 (neoplasm of thorax) is a neoplasm (disease) that involves the thoracic segment of trunk. Also known as: neoplasm of the thorax, neoplasm of thoracic segment of trunk, thoracic neoplasm, thoracic segment of trunk neoplasm, thoracic segment of trunk neoplasm (disease), thoracic segment of trunk tumor, thoracic segment of trunk tumour, thoracic tumor.