Jurairattanaporn Natthachat, Suchonwanit Poonkiat, Rattananukrom Teerapong, Vachiramon Vasanop
Dr. Jurairattanaporn is also with the Department of Dermatology, Faculty of Medicine at Srinakharinwirot University in Bangkok, Thailand.
All authors are with the Division of Dermatology, the Faculty of Medicine Ramathibodi Hospital at Mahidol University in Bangkok, Thailand.
J Clin Aesthet Dermatol. 2022 Aug;15(8):16-21.
Postinflammatory hyperpigmentation (PIH) is a common problem, especially in patients with darker skin tones. It can occur on any area of the body following external injuries or intense inflammatory conditions. However, there is limited evidence regarding the differences in dermatoscopic patterns between facial acne-related PIH and nonfacial acne-related PIH.
We sought to determine the dermatoscopic features of acne-related PIH in facial and nonfacial areas in an Asian population.
Patients with acne-related PIH in both facial and nonfacial areas were enrolled. Baseline demographic data, location, and duration of PIH were recorded. Dermatoscopic and clinical pictures of each patient were taken from the darkest PIH lesions of both areas. Differences in dermatoscopic patterns were analyzed.
Fifty patients were enrolled. The mean age was 26.74 (+ 6.75) years, and the Fitzpatrick Skin Types were III (66%) and IV (34%). In terms of morphological patterns of melanin, nonfacial PIH showed a significantly more regular pigment network than facial PIH (100% vs. 20%, <0.05), while facial PIH exhibited a more pseudoreticular pigment network than nonfacial PIH (70% vs. 0%, <0.05). In terms of vascularity, facial PIH demonstrated more telangiectasia and an increased vascular component compared to nonfacial PIH (56% vs. 16%, <0.05). Moreover, hypopigmentation within the PIH lesion was demonstrated in both facial and nonfacial lesions (42% vs. 50%, =0.541).
Acne-related PIH in facial and nonfacial areas showed different morphological pigment patterns and degrees of vascularity. Dermatoscopic examination should be performed before treatment initiation.
炎症后色素沉着（PIH）是一个常见问题，在肤色较深的患者中尤为常见。它可发生于身体任何部位的外伤或严重炎症之后。然而，关于面部痤疮相关PIH与非面部痤疮相关PIH的皮肤镜表现差异的证据有限。
我们试图确定亚洲人群中面部和非面部痤疮相关PIH的皮肤镜特征。
纳入面部和非面部均有痤疮相关PIH的患者。记录基线人口统计学数据、PIH的部位和持续时间。从两个部位最深的PIH皮损处拍摄每位患者的皮肤镜和临床照片。分析皮肤镜表现的差异。
共纳入50例患者。平均年龄为26.74（±6.75）岁，Fitzpatrick皮肤分型为Ⅲ型（66%）和Ⅳ型（34%）。在黑色素形态模式方面，非面部PIH显示出比面部PIH更规则的色素网（100%对20%，<0.05），而面部PIH显示出比非面部PIH更多的假网状色素网（70%对0%，<0.05）。在血管方面，与非面部PIH相比，面部PIH表现出更多的毛细血管扩张和增加的血管成分（56%对16%，<0.05）。此外，面部和非面部皮损的PIH病变内均有色素减退表现（42%对50%，=0.541）。
面部和非面部痤疮相关PIH表现出不同的形态色素模式和血管程度。在开始治疗前应进行皮肤镜检查。
