10- Swallowing Issues
Any abnormal issues with indigestion may be a sign of cancer. You could have cancer of the throat, esophagus, or stomach. This could be followed by problems with swallowing too.
11- Other Strange Symptoms
There are some other strange symptoms which may or may not mean cancer. For example, if you experience swollen feet for some unknown reason, then you should have a doctor try to explain to you why you have that.