It is an ailment doctors complain about regularly these days. Too well-informed patients visit doctor’s offices with their mind made up: they are sure to have brain cancer. They Googled it and have every symptom the WikiPedia page lists.
Doctors have an increasingly hard time convincing these ill informed patients that there is nothing wrong with their heads. Now Mr. Horvitz at Microsoft Research has done extensive research that confirms this ailment.
So, next time you come complaining about that deadly rash you read about on your iPhone your doctor will most likely diagnose you as a cyberchondriac.
Read next: Would you trust WikiPedia with your life?