Patient No. 1:   (Ulcers)  Doc, I have a dull, burning sensation in my stomach.  The pain subsides if I eat something or take an antacid.  Sometimes my stomach feels bloated.  I've also been losing weight.

Patient No. 2:  (Stomach cancer)  Can you help me, Doctor?  I have indigestion, and I feel chronic discomfort in my stomach. The pain gets worse after I eat.  I'm often a bit nauseous, and once in awhile I produce vomit which contains some blood it in.  I think there is also blood in my stool.  I am losing weight, and I am also losing my appetite.  

Patient No. 3:  (Appendicitis)   I have a dull pain near my navel (belly button), and the pain gets worse as you go down and to the right.  I feel nauseous soon after the pain begins. My abdomen is swollen, and I have a fever.  I have little appetite.