Maybe this stage should be added to the dsm as another essential criterion for ptsd:


CRITERION G: To qualify under this criterion, the patient must have experienced the following:

"patient has been given at least three different diagnoses over a period of time"
"patient has been advised on previous occasions that he or she does not have ptsd"
"patient has seen at least three experienced professionals"
"patient has been prescribed at least 3 different types of medication, which haven't produced significant improvements"

When the patient has just about given up all hope, they may be diagnosed as having ptsd, providing all other criteria have been met.