Answer:
The disease is idiopathic.


(This means it's unique to the individual and the cause follows no known pattern. Or, as House M.D. translates it: "It means we're idiots because we don't know what's causing it.")
First answer by ID2904098992. Last edit by Steverapaport. Contributor trust: 28 [recommend contributor recommended]. Question popularity: 0 [recommend question].