Symptoms of cancer of unknown primary are usually noticed in the area where the tumor is found. This may be the lungs, liver, bones, or lymph nodes.

However, some people have no symptoms. They learn they have cancer after a medical or imaging test for another condition. Others experience symptoms that could result from a variety of health conditions.

If symptoms occur, they may include:

• pain in a specific area of the body, such as the chest, belly, or bones
• loss of appetite
• weight loss
• a lump in any part of the body, including the lymph nodes
• a persistent cough or hoarseness
• changes in bowel or bladder habits
• a persistent fever or night sweats