[indian]

If I miss the number one diagnosis, are they going to fail me?
Like for example a case of Migraine in which I gave tension headache, brain tumor, cluster headache, temporal arteritis, ....etc but did not give Migraine!
Does that constitute a complete failure in the exam!

 

[khanar]

If you get the primary diagnosis right you pass, if you don't get it you can still pass the case if you placed reasonable alternative diagnoses.
In the example you gave, I think you pass the ICE component