Lymph nodes
The primary tumor of the lungs causes the development of lumps in the neck or the collar bone as cancer spreads to the lymph nodes in the nearby area in the extensive stage of lung cancer, when both of the lungs are suffering from tumor growth then the lymph nodes on both sides of the lungs suffer from cancer. There is swallowing of lymph nodes and glands in the chest area and leads to the stomach’s swallowing if cancer reaches the liver.