title: Phototrichogram findings in women with androgenetic alopecia.
abstract: OBJECTIVE
  Androgenetic alopecia (AGA) in women is characterized by diffuse thinning in the frontal and parietal areas of the scalp; preservation of the frontal hairline is norm. Hair over the occipital scalp is preserved. The purpose of this work was to investigate the findings of phototrichogram (PTG) of the affected and the spared areas in women with AGA and to compare them with those of healthy subjects.
  
  
  METHODS
  Twenty-two controls and 60 untreated women with AGA (32 with Ludwig I, 28 with Ludwig II) were included in this study. Hair density, percentages of thin hair, and non-growing hair were estimated both on the midscalp and on the occiput by using PTG with digital camera attached to a dermoscope.
  
  
  RESULTS
  In the control group, hair density was higher on the midscalp than the occiput. In AGA groups, hair density was lower on the midscalp than the occiput and percentages of thin hair and non-growing hair were higher on the midscalp than the occiput. These findings were more prominent in Ludwig II group. In the occiput there were findings mimicking the changes seen on the midscalp. These were less striking than those seen on the midscalp yet the difference between the control and Ludwig II group was statistically significant.
  
  
  CONCLUSIONS
  We concluded that the hair is not equally distributed on the scalp, the occiput may be affected in females with AGA and further studies are necessary to support these findings.
authors.affiliation: Department of Dermatology, Sisli Etfal Research and Training Hospital, Istanbul, Turkey. tre@ttnet.net.tr
authors.forename: Tugba Rezan
authors.initials: TR
authors.lastname: Ekmekci
authors.forename: Adem
authors.initials: A
authors.lastname: Koslu
mesh_terms: D000328:Adult; D000505:Alopecia / Q000473:pathology*; D046169:Dermoscopy; D005260:Female; D006197:Hair / Q000473:pathology*; D006801:Humans; D010781:Photography / Q000379:methods*; D014741:Video Recording