A malignant neoplasm originating from the apical lung. Most malignant superior sulcus neoplasms are bronchogenic carcinomas. This tumor may be associated with Pancoast syndrome. It is also known as Pancoast tumor. The disease is malignant superior sulcus neoplasm (Monarch Disease Ontology term MONDO_0006883). Also known as: Pancoast tumor, Pancoast tumour, Pancoast's tumor, Pancoast's tumour, malignant Superior sulcus lung neoplasm, malignant Superior sulcus lung tumor, malignant Superior sulcus lung tumour, malignant Superior sulcus neoplasm.