@article{5776225,
  abstract     = {Introduction : Our knowledge concerning the effects of testosterone (T) therapy on the skin of trans men (female-to-male transsexuals) is scarce. 
Aim : The aim of this study was to evaluate the short- and long-term clinical effects of T treatment on the skin of trans men. 
Methods : We conducted a prospective intervention study in 20 hormone naive trans men and a cross-sectional study in 50 trans men with an average of 10 years on T therapy. 
Main Outcome Measures : Acne lesions were assessed using the Gradual Acne Grading Scale, hair patterns using the Ferriman and Gallwey classification (F&G), and androgenetic alopecia using the Norwood Hamilton Scale. 
Results : T treatment increased facial and body hair growth. The F&G score increased progressively from a median value of 0.5 at baseline to a value of 12 after 12 months of T administration. After long-term T treatment, all but one trans man achieved an F&G score indicative of hirsutism in women, with a median value of 24. Only one trans man acquired mild frontotemporal hair loss during the first year of T treatment, whereas 32.7% of trans men had mild frontotemporal hair loss and 31% had moderate to severe androgenetic alopecia after long-term T therapy. The presence and severity of acne increased during the first year of T therapy, and peaked at 6 months. After long-term T treatment, most participants had no or mild acne lesions (93.9%). Dermatological outcome was not demonstrably related to individual serum T or dihydrotestosterone levels. 
Conclusions : T treatment increased facial and body hair in a time-dependent manner. The prevalence and severity of acne in the majority of trans men peaked 6 months after beginning T therapy. Severe skin problems were absent after short- and long-term T treatment.},
  author       = {Wierckx, Katrien and Van de Peer, Fleur and Verhaeghe, Evelien and Dedecker, David and Van Caenegem, Eva and Toye, Kaatje and Kaufman, Jean and T'Sjoen, Guy},
  issn         = {1743-6095},
  journal      = {JOURNAL OF SEXUAL MEDICINE},
  keywords     = {FOLLICLES,ACNE,RECEPTOR,PRACTICE GUIDELINE,SEBUM PRODUCTION,HIRSUTISM,WOMEN,HAIR-GROWTH,ANDROGENETIC ALOPECIA,TRANSSEXUAL PERSONS,Gender Dysphoria,Female-to-Male Transsexual,Skin,Transsexualism,Testosterone,Gender Identity Disorder},
  language     = {eng},
  number       = {1},
  pages        = {222--229},
  title        = {Short- and long-term clinical skin effects of testosterone treatment in trans men},
  url          = {http://dx.doi.org/10.1111/jsm.12366},
  volume       = {11},
  year         = {2014},
}

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