Well, since PTT is prolonged we know its an intrinsic definciency (i.e. factor VIII) and so we can narrow it down to Hemophilia A or vWD. But since they tell you there is no increase in bleeding time, its more likely to be Hemophilia. But this question sucks cause they really dont give you enough info since approximately 50% of vWD patients dont have an increase in Bleeding time either. Plus with no family history of hemophilia and no joint swelling or anything, and considering vWD is so much more common, vWD would be my guess. Do the ristocetin test!!! LOL...

Val