|LETTER TO EDITOR
|Year : 2018 | Volume
| Issue : 5 | Page : 241-243
The “Starry night sky sign” Using ultraviolet-light-enhanced trichoscopy: A new sign that may predict efficacy of treatment in frontal fibrosing alopecia
Ana Rita Rodrigues-Barata, Oscar Muñoz Moreno-Arrones, David Saceda Corralo, Sergio Vañó Galvan
Department of Dermatology and Venereology, Ramón y Cajal Hospital, Madrid, Spain
|Date of Web Publication||3-Dec-2018|
Ana Rita Rodrigues-Barata
Department of Dermatology, Ramón y Cajal Hospital, Carretera Colmenar Viejo, Km 9.100, 28034 Madrid
Source of Support: None, Conflict of Interest: None
|How to cite this article:|
Rodrigues-Barata AR, Moreno-Arrones OM, Corralo DS, Galvan SV. The “Starry night sky sign” Using ultraviolet-light-enhanced trichoscopy: A new sign that may predict efficacy of treatment in frontal fibrosing alopecia. Int J Trichol 2018;10:241-3
|How to cite this URL:|
Rodrigues-Barata AR, Moreno-Arrones OM, Corralo DS, Galvan SV. The “Starry night sky sign” Using ultraviolet-light-enhanced trichoscopy: A new sign that may predict efficacy of treatment in frontal fibrosing alopecia. Int J Trichol [serial online] 2018 [cited 2021 Feb 26];10:241-3. Available from: https://www.ijtrichology.com/text.asp?2018/10/5/241/246795
Treatment regimen in frontal fibrosing alopecia (FFA) is given based on the presence of inflammatory signs (perifollicular erythema and follicular hyperkeratosis) or by the presence of symptoms even though their absence does not exclude disease progression.,, In early stages, partial hair regrowth is possible; however, in late stages, treatment offers no benefit.
We performed a prospective study with the objective of evaluating if the examination with ultraviolet (UV)-light-enhanced trichoscopy (UVET) may be used to predict potential efficacy of medical treatments in FFA. Twelve female consecutive patients with FFA were included, with a mean age of 48 years (range 39–63 years). Patients received oral dutasteride 0.5 mg, clobetasol propionate 0.05% foam, and topical 5% minoxidil daily. Clinical response was observed after a 6-month follow-up period. A positive pattern of fluorescence within the follicular ostia was observed using UVET with × 50 amplification in seven patients and negative in remaining five patients. In the 6-month follow-up visit, in those patients with positive fluorescence, 57.1% (4/7) showed a partial hair regrowth and 42.9% (3/7) showed disease stabilization [Figure 1]c and [Figure 1]d. In patients with negative UVET, no hair regrowth was observed [Figure 2]c and [Figure 2]d.
|Figure 1: Frontal fibrosing alopecia. “Starry night sky sign” positive in frontal region (a and b) in a 46-year-old female patient before partial hair regrowth in the frontal hairline was observed, after a 6-month treatment with a topical corticosteroid, 5% topical minoxidil, and oral dutasteride (c and d, respectively). Red arrows: Follicular Propionibacterium observed with ultraviolet-light-enhanced trichoscopy with ×50|
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|Figure 2: Frontal fibrosing alopecia. “Starry night sky sign” negative (a and b) in a 63-year-old female patient with no hair regrowth after treatment with 5% topical minoxidil and oral dutasteride after a 6-month period (c and d, respectively)|
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The UVET uses UV type A long wave, with a wavelength peak at 365 nm, which when applied to the skin will generate a characteristic fluorescence in the presence of certain skin conditions. Propionibacterium acnes, which can be found within acne comedones, generates a red-orange fluorescence caused by the production of porphyrins when illuminated with this UVET. Further, compacted keratin usually shows a whitish-yellow fluorescence with the same illumination. We use a ×50 trichoscopy with a UV light lent (MicroCAMERA®, Dermotricos SRL, Coccaglio, Italy) that allows the objective visualization of this pattern of fluorescence within the follicular ostia. This clinical image is reminiscent of “starry night over the Rhone” by Van Gogh, hence why the authors have named the sign “starry night sky sign” [Figure 1]a and [Figure 1]b. Thus, if this fluorescence is positive, it can be assumed the presence of follicular Propionibacterium, and therefore, the possible preservation of the follicular unit viability, indicating a better prognosis. On the contrary, if the follicular unit is fibrosed, this activity will not be observed [Figure 2]a and [Figure 2]b.
We hypothesize that after exploring the entire frontotemporal line, if the “starry night sky sign” is positive in any area, local treatments may be used to stabilize alopecia and even achieve a partial regrowth. In the absence of this sign, local treatment with topical and/or infiltrated corticosteroids would not be advisable because of the unlikelihood of improvement. We believe that UVET is a complementary tool to trichoscopy and clinical examination to improve detection of disease progression. No biopsies were performed because of patients' reluctance of a scar in their frontotemporal line, but the positive clinical response after treatment when the sign is present makes us assume its utility.
We propose UVET as a simple and inexpensive tool that may predict the potential efficacy of medical treatments in FFA.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form, the patients have given their consent for their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal identity, but anonymity cannot be guaranteed.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2]