You know how with senile alopecia or DUPA, the hairs miniaturize but don’t (usually anyways) actually shrink to the point where they fall out and stop growing altogether? They miniaturize to a certain extent but then stabilize in a miniaturized state and are still retained (hence why you don’t see people with DUPA develop totally bald scalps because the hair is still there, just much thinner). Well, can the same thing occur with patterned hair loss? Where the hairs in the thinning areas of the scalp (vertex and/or hairline depending on the Norwood level) miniaturize to certain degree but then stabilize at that point and don’t continue to miniaturize to the point that they fall out and totally stop growing altogether? Or in patterned hair loss, miniaturizing hairs in a thinning area of the scalp will most definitely shrink to the point of no more growth?
You are drawing a lot of conclusions about DUPA. Is DUPA another form of Senile Alopecia? I frankly don’t know, but I doubt it. DUPA will progress over time, possibly leaving very little hair on the head. We don’t know enough about the long-term course of DUPA, but it is different because it impacts the Donor area as well as every other place on the head. Someone can have genetic patterned hair loss and then develop DUPA. These men are in a tough place, as their patterned hair loss may progress to full balding, leaving an extremely thin donor area.