Henry Khunrath Pancoast (1875 – 1939) was an American radiologist. The Pancoast tumour and Pancoast syndrome is named after him
Pancoast Tumour is a primary bronchogenic carcinoma which arises in the apex of the lung at the superior pulmonary sulcus.
Pancoast Syndrome occurs secondary to local compression of brachial plexus and sympathetic chain by superior (pulmonary) sulcus tumors.
Horner Syndrome = unilateral interruption of ascending cervical sympathetic innervation eye and face.