Pancoast tumor overview

Overview
A pancoast tumor, also pancoast tumour (UK) or superior sulcus tumor, is a tumor of the pulmonary apex i.e. a type of lung cancer defined primarily by its location situated at the top end of either the right or left lung.

The growing tumor can cause compression of a brachiocephalic vein, subclavian artery, phrenic nerve, recurrent laryngeal nerve, or, characteristically, compression of a sympathetic ganglion resulting in a range of symptoms known as Horner's syndrome.