Nwako-Mohamadi Maitseo K, Masenga John E, Mavura David, Jahanpour Ola F, Mbwilo Eva, Blum Andreas
Regional Dermatology Training Centre, Kilimanjaro Christian Medical Centre, Moshi, Tanzania.
Kilimanjaro Christian Medical University College, Moshi, Tanzania.
Dermatol Pract Concept. 2019 Jan 31;9(1):44-51. doi: 10.5826/dpc.0901a11. eCollection 2019 Jan.
Papulosquamous skin diseases can be challenging to diagnose, especially in dark skin. Dermoscopy is reported to be helpful, but few data are available on its use in skin type IV or darker.
To describe dermoscopic features in plaque-type psoriasis (PP), lichen planus (LP), and pityriasis rosea (PR) patients attending the Regional Dermatology Training Centre in Moshi, Northern Tanzania, and to compare findings with published data.
A descriptive cross-sectional study was conducted at a tertiary hospital from October 2016 to June 2017. Fifty-six patients with PP, 25 with LP, and 9 with PR were enrolled consecutively. Clinical diagnosis was confirmed with histopathology in 74.4%. Dermoscopic vascular and nonvascular features from 225 lesions were analyzed.
Of the 90 patients enrolled, 58.9% were male and the median age was 50 (interquartile range 32.8-60.0) years. In PP lesions, red dots were found in 64.2% and white scale in 45.5%. In LP lesions the background was violet in 45.5% and 58.2% revealed Wickham striae. In PR lesions a dull red background was found in 50.0%, white scale in 83.3%, but no vessels were detectable.
Dermoscopy features in PP, LP, and PR in dark skin are mostly similar to those in light skin.
丘疹鳞屑性皮肤病的诊断可能具有挑战性，尤其是在深色皮肤人群中。据报道，皮肤镜检查对此有帮助，但关于其在IV型或更深肤色皮肤中的应用数据很少。
描述在坦桑尼亚北部莫希地区皮肤病培训中心就诊的斑块型银屑病（PP）、扁平苔藓（LP）和玫瑰糠疹（PR）患者的皮肤镜特征，并将结果与已发表的数据进行比较。
2016年10月至2017年6月在一家三级医院进行了一项描述性横断面研究。连续纳入56例PP患者、25例LP患者和9例PR患者。74.4%的患者通过组织病理学确诊临床诊断。对225个皮损的皮肤镜血管和非血管特征进行了分析。
在纳入的90例患者中，58.9%为男性，中位年龄为50岁（四分位间距32.8 - 60.0岁）。在PP皮损中，64.2%可见红点，45.5%可见白色鳞屑。在LP皮损中，45.5%的背景为紫色，58.2%可见威克姆纹。在PR皮损中，50.0%可见暗红色背景，83.3%可见白色鳞屑，但未检测到血管。
深色皮肤中PP、LP和PR的皮肤镜特征大多与浅色皮肤中的相似。
