Male Pattern Hair Loss
A physician hair restoration specialist can often predict the final appearance of hair loss based upon the rapidity of onset and progression. Male AGA occurs in an array of patterns illustrated in the Norwood-Hamilton Scale. The Norwood-Hamilton Scale is used by physician hair restoration specialists in assessing hair loss and in planning hair loss treatment. The Norwood-Hamilton Scale illustrates a feature of AGA that makes hair transplantation possible:
No matter how severe the hair loss, hair is never lost at the back or sides of the head or on the nape of the neck. These regions are under different genetic control from the gene(s) that affect hair follicles at the front and top of the head. This“preserved” hair at the back and sides of the head is a reservoir of healthy follicles that can be harvested and transplanted to scalp areas where hair has been lost.