Jean-Francois Grollier

Study of the re‐oiling process of hair with the replica technique

In the case of individuals with oily hair, the sebum excreted to the scalp surface spreads over the hair during the days following hair washing. The migration of sebum from the roots to the ends of hairs creates a gradient which may be measured by making casts on appropriate materials.

A study of the effects of topical minoxidil in the treatment of androgenic alopecia using phototrichograms

Summaries of papers and compared them with 60 women (mean age 22 years, broadly matched for age, acne severity, predominant site of acne and current use of hormonal therapy) who had achieved > 80% improvement in the same period. The mean hirsutes scores for the therapy resistant and therapy responsive groups were similar (2-0 and 2 1 , respectively). In addition the incidence of significant hirsutes (score > 6) was low and not significantly different between the two groups (6-7 and 3 3 % , respectively). There was no correlation between percentage improvement in acne severity grade and hirsutes score. The two groups were also similar in respect of age at menarche, incidence of male and female pattern androgenic alopecia, keratosis pilaris, acanthosis nigricans and hidradenitis suppuritiva. There was a lower incidence of menstrual irregularity in the therapy resistant group. These results clearly show that clinical features of hyperandrogenism and lack of response to conventional antibiotic therapy are not related. These data also argues against the view that raised circulating androgens are an important factor in the development of resistant acne. Thus, clinical markers of hyperandrogenism cannot help the physician in deciding which female patients will or will not respond to conventional antibiotic therapy.