Diffuse patterned hair loss (DPA) is characterized by hair loss (thinning) across the top of the scalp while the hair on the sides and back of the scalp remain intact. Because donor hair is taken from the sides and back of the scalp, those with a DPA hair loss pattern are often good candidates for surgical hair transplantation. Diffuse unpatterned hair loss (DUPA), on the other hand, is characterized by hair loss not only from the top of the head but also from the sides and back of the scalp. Because persons with DUPA hair loss have thinning on the sides and back, they are usually not good candidates for a hair transplant. DUPA is relatively uncommon in men but it is the most common type of hair loss in women. Both DPA and DUPA in men respond well to medical treatment using minoxidil and finasteride. Unfortunately, finasteride is not indicated for the treatment of hair loss in women.
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