My first response is to validate the feeling that if a presentation is "atypical" it is most likely to receive a psychiatric diagnosis--I well remember the entire medical/nursing staff shunning the 3 or 4 mothers of autistic children who were on a pediatric unit onto which I rotated in the mid 60's. (this was a major regional "charity hosp." hence the reason for such a large # of autism patients--5 to 9 /yr was a large # back then--that's another post)We were all very aware that autism was due to very poor mothering....and schizophrenia was thought to be due to dysfunctional family dynamics (mostly the mother again).
If it is not known in the present world of medicne, it must be psychiatric in origin. Madelyn