Hi there. Your symptoms do resemble those of pancoast’s tumor, tumor that forms at the apex of either lung in the superior sulcus and may invade the adjoining tissue due to location. They form an abnormalpatch of tissue over the lung apex and invade lymphatics, lower 4 cervical andfirst thoracic root of brachial plexus, intercoastal nerves, stellate ganglion, sympathetic chain and adjacent ribs and vertebrae. The main culprit is smoking, symptoms being pain in shoulder, inner part of scapula, inner side of arm, elbow,pinky and ring fingers. The pain is severe and hand, arm, forearm may atrophy or develop paresthesia, tingling. You need a chest xray chest, better a CT/MRI chest to check the tumor and local spread. Brochoscopy, biopsy will aid in confirming the diagnosis. Treatment may involve surgery, chemo and radiotherapy. Hope this helps. Take care.