Delineating the “Safe” Donor Area for Hair Transplanting

Three hundred twenty-eight patients were examined and classified according to age (65–69, 70–74, 75–79, and ≥80 years) and degree of male pattern baldness Hamilton/Norwood Class I-VII. In addition, the inferior to superior height of potential temporal, parietal, and occipital donor sites containing at least eight hairs per 4-mm round circle was measured. A schematic drawing of the borders of this “safe” donor area containing permanently hair-bearing scalp with adequate hair density for transplanting is presented.