Write about Pancoast Tumour here.

• Carcinoma situated in the superior sulcus of the lung, where the subclavian artery forms a groove over the lung apex

• Due to its location it gives rise to a characteristic syndrome:

• ipsilateral Horner's Syndrome due to Stellate Ganglion involvement

• Pain due to erosion of the posterior 1st and 2nd ribs

• Wasting of the small muscles of the hand due to Brachial Plexus invasion

• May invade a vertebral foramen giving spinal cord compression

• Tumour is notoriously difficult to detect on CXR and cause of pain often misdiagnosed