“However unexplained weight loss of 10lbs or more can be cause for concern and may be the first sign of cancer.
“This happens most commonly with pancreas, stomach, esophagus and lung cancer.
“People with lung cancer may have difficulty in chewing or swallowing. This can cause their food intake, and therefore their weight, to drop. They may also experience nausea or a lack of appetite.
“Cancer cells also use a disproportionate amount of the body’s energy supply and often release substances that alter the way the body processes food energy. These changes, too, can result in weight loss.”