- Reaction score
- 975
Very interesting read about the progresion of hair loss in the crown.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4037775/pdf/aps-41-277.pdf
Background The most crucial factor in hair transplantation for male pattern baldness
(male pattern baldness) patients is the efficient utilization of the donor–recipient ratio. However, there is no
known factor that scientifically predicts the rate of progression of alopecia or indicates a
permanently safe donor area.
Methods The study considered 1,008 Korean adult males with male pattern baldness; of these, it excluded 56
males with an absence of parietal whorls (PWs). The authors investigated the distance from
the vertical bimeatal line (VM) to the PW, from the PW to the upper border of the helical rim
(HR), and the distance from the PW to the occipital fringe (OF) in 952 subjects with a PW.
Furthermore, we examined the distance from the PW to the OF considering the duration of
alopecia and age in 322 subjects with vertex alopecia.
Results The distance between the VM and PW varied from 1.5 to 11 cm, with an average
distance of 6.25 cm. The PW–HR distance ranged from 3.4 to 17.5 cm, and the average
distance was 7.79 cm. The PW–OF distance ranged from 0.5 to 5.5 cm, and the average
distance was 2.37 cm.
Conclusions For the PW, very large variations existed in the vertical direction. The position
of the PW could predict the progression range of the total alopecia of the vertex. Alopecia
mostly progresses within 6 cm of the PW toward the occipital side.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4037775/pdf/aps-41-277.pdf
Background The most crucial factor in hair transplantation for male pattern baldness
(male pattern baldness) patients is the efficient utilization of the donor–recipient ratio. However, there is no
known factor that scientifically predicts the rate of progression of alopecia or indicates a
permanently safe donor area.
Methods The study considered 1,008 Korean adult males with male pattern baldness; of these, it excluded 56
males with an absence of parietal whorls (PWs). The authors investigated the distance from
the vertical bimeatal line (VM) to the PW, from the PW to the upper border of the helical rim
(HR), and the distance from the PW to the occipital fringe (OF) in 952 subjects with a PW.
Furthermore, we examined the distance from the PW to the OF considering the duration of
alopecia and age in 322 subjects with vertex alopecia.
Results The distance between the VM and PW varied from 1.5 to 11 cm, with an average
distance of 6.25 cm. The PW–HR distance ranged from 3.4 to 17.5 cm, and the average
distance was 7.79 cm. The PW–OF distance ranged from 0.5 to 5.5 cm, and the average
distance was 2.37 cm.
Conclusions For the PW, very large variations existed in the vertical direction. The position
of the PW could predict the progression range of the total alopecia of the vertex. Alopecia
mostly progresses within 6 cm of the PW toward the occipital side.