question: My husband, 43,  has a visible lump underneath his left clavicle. It is spongy and about quarter-size. He is experiencing constant fatigue, pain in his left arm and numbness & tingling in his right arm. He is a smoker and has wheezing as well as constant mucus. Cancer runs in his family. His doctor ordered a CT scan w & w/o contrast. Could this be possibly a Pancoast Tumor?