14 Silent Signs Of Lung Cancer That May Surprise You

Cancer is not the direct cause of shoulder and arm pain, but a rare type of cancerous tumor called Pancoast tumor that grows on the upper part of your lungs could lead to this. These tumors seldom affect your breathing, making them a truly silent sign of lung cancer.

Pancoast tumors cause pain in the shoulders as well as arms and even lead to muscle weakness, tingling skin, and a loss of feeling in the arms. Gradually, the growth of such tumors are accompanied by pain spreading through your upper back. About 40 percent of those with Pancoast tumors tend to develop Horner’s syndrome, one of the symptoms of which is shoulder pain.