White and yellow dots as new trichoscopic signs of severe female androgenetic alopecia in dark skin phototypes

Tawfik, Soha S; Sorour, Osama; Alariny, Aly F.; Elmorsy, Eman H.; Moneib, Hoda

doi:10.1111/ijd.14140

Cited by 15 publications

(25 citation statements)

References 21 publications

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“…Compatible to our study, Rakowska et al reported that 65% (39/59) of AGA patients had single‐hair pilosebaceous unit and Tawfik et al demonstrated that 97.4%(77/79) of AGA patients had single‐hair pilosebaceous unit on the frontal scalp.…”

Section: Discussionsupporting

confidence: 92%

“…Other studies as reported higher percentages than our study (63% and 83%), respectively. Tawfik et al suggested that this disparity in findings could be explained by the difference in ethnic group enrolled in the previous studies. Another cause of such disparity is the removal of the accumulated sebum by washing hair.…”

Section: Discussionsupporting

confidence: 87%

“…Its trichoscopic findings were hair diameter diversity (HDD) 100% (100/100), single‐hair pilosebaceous unit 96% (96/100), peripilar sign 61% (61/100), and yellow dots (YD) 45% (45/100). It was shown that all patients with AGA demonstrated HDD in all patients of Kibar et al, who found that all of patients with AGA demonstrated HDD 100% (143/143) also with Rakowska et al, who found it in 97% (35/36) and Tawfik et al, who found it in all patients (79/79), confirming that this sign is the main criterion in AGA. The HDD is due to miniaturization of hair follicles due to androgen effect and modulated through DHT as explained by De Lacharrière et al, who considered the progressive hair miniaturization the key point during androgenic alopecia.…”

Section: Discussioncontrasting

confidence: 76%

“…In contrast to our study, previous studies reported different percentages in yellow dots and there was a lot of disparity in the results. Rakowska et al, 11 Kibar et al, 7 Hu et al, 12 and Tawfik et al 9 found that yellow dots range from 15% to 26%. Other studies as 8 reported higher percentages than our study (63% and 83%),…”

Section: Discussionmentioning

confidence: 99%

“…Similar to our study, Hu et al found that 44% (88/200) of AGA patients had peripilar sign, as well as Tawfik et al who reported that 31.7% (25/79) of patients has peripilar sign. Similarly, peripilar sign was observed in the range of 20%‐60% in previous studies as reported by Köse et al and Ramos et al .…”

Section: Discussionmentioning

confidence: 99%

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Trichoscopic evaluation of frontal hairline recession in Egyptian female patients

Said

El-Sayed

Elkhouly

2020

J of Cosmetic Dermatology

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Background Since frontal hairline is the most characteristic feature of the face for both men and women, affecting the psychological state of patients, hair loss has been considered to be one of the most prominent esthetic problems. Hair loss either resulting from the androgenetic or nonandrogenetic origin is characterized by changes in the anterior line. Aim The aim of this study was to evaluate the causes of the frontal hairline recession in Egyptian female patients using trichoscopy and to detect the prevalence of each of those causes in Egyptian females. Patients and Methods This study was performed on a total of 200 Egyptian female patients aged between 15 and 65 years who complained of frontal hairline recession. All patients were derived from Al‐Zahraa University hospital outpatient clinic over a period from November 2017 to April 2019. We classified them into two groups according to age: Group A: 15‐45 and Group B: 46‐65. After full history taking, general and dermatological examination, photographs of hair recession were taken from both frontal and temporal sides. Then, the trichoscopic examination by noncontact dermoscopy was done photographed and evaluated. Results The most common cause of the frontal hairline recession in Egyptian female patients was androgenetic alopecia (AGA) (50%). Most of the patients were of old age (58%). The high statistically significant trichoscopic findings in androgenetic alopecia were yellow dots, peripilar sign, hair diameter diversity, and single‐hair pilosebaceous unit (45.0%, 61.0%, 100.0%, and 96.0%), respectively. On the other hand, perifollicular scaling, absence of hair follicles, and lonely hair revealed a high statistically significant presentation (88.9%, 100.0%, and 22.2%), respectively, with frontal fibrosing alopecia, and vellus hair (100.0%) and perifollicular casts (91.8%) with tractional alopecia. Finally, hair broken at different levels (100%), black powder (88.9%), black dots (100.0%), hook hairs (11.1%), i hair (16.7%),V sign (44.4%), flame hairs (33.3%), coiled hair (5.6%), and burnt match stick sign (5.6%) showed a high statistically significance presentation with trichotillomania. Conclusion The present study supports the trichoscopic criteria for the diagnosis of causes of frontal hairline recession, which provide a noninvasive diagnostic tool compared with histopathological diagnosis.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 87%