NCIt definition : A neoplasm originating from the apical lung. Most superior sulcus neoplasms are bronchogenic
carcinomas. This tumor may be associated with Pancoast syndrome. It is also known
as Pancoast tumor.;
Alternative definition : NCI-GLOSS: A type of lung cancer that begins in the upper part of a lung and spreads
to nearby tissues such as the ribs and vertebrae. Most pulmonary sulcus tumors are
non-small cell cancers.;