Answer:
Adam remarried and got a second wife.
Step-by-step explanation:
The given situation of Adam's wife having appendicitis is that he's got a second wife because the doctor confirms that he himself extricated his wife's appendicitis two years back. This supports the deduction that his first wife cannot have appendicitis and the present reports revealing that his wife has appendicitis suggests that he has remarried and has a second wife who might suffer this disease. Thus, the riddle has the answer in the statement itself.