High-frequency skin ultrasonographic and dermoscopic features of seborrheic keratosis
10.3760/cma.j.issn.0412-4030.2018.11.009
- VernacularTitle:脂溢性角化病的皮肤高频超声及皮肤镜特征分析
- Author:
Shiqi WANG
1
;
Jie LIU
;
Zhaorui LIU
;
Cheng CHI
;
Yuehua LIU
;
Hongzhong JIN
Author Information
1. 100730,中国医学科学院北京协和医学院北京协和医院皮肤科
- Keywords:
Keratosis,seborrheic;
Ultrasonography;
Dermoscopy;
Pathologic processes;
Skin manifestations
- From:
Chinese Journal of Dermatology
2018;51(11):815-819
- CountryChina
- Language:Chinese
-
Abstract:
Objective To describe high-frequency skin ultrasonographic and dermoscopic features of seborrheic keratosis (SK).Methods Between August and December in 2017,46 outpatients with SK were enrolled from the Department of Dermatology of Peking Union Medical College Hospital,and 50 SK lesions were observed by 50-and 20-MHz high-frequency skin ultrasonography and dermoscopy.The highfrequency ultrasonographic and dermoscopic features of SK lesions were summarized and analyzed.Statistical analysis was done by using chi-square test for comparisons of evaluation results of SK lesions between 50-and 20-MHz ultrasonography,and the correspondence between high-frequency skin ultrasonographic and dermoscopic features of SK was analyzed by calculating the simple matching coefficient.Results As 50-and 20-MHz ultrasonography showed,ultrasonographic features of SK lesions from top to bottom were enhanced hyperecho (48/50 vs.39/50,respectively,P =0.007),enhanced hyperechoic masses or spots in the stratum corneum (22/50 vs.11/50,respectively,P =0.019),sound shadows behind the epidermis (34/50 vs.13/50,respectively,P ＜ 0.001),skin lesions with regular shapes and clear borders (46/50 vs.41/50,respectively,P =0.137),heterogeneous hypoechoic areas in the lesions (50/50 vs.47/50,respectively,P =0.079) and internal hyperechoic spots (25/50 vs.2/50,respectively,P ＜0.001),the lesional bottom being at the same level (40/50 vs.36/50,respectively,P =0.349),and reduced dermal echogenicity below the lesion (50/50 vs.28/50,respectively,P ＜ 0.001).In regard to the overall evaluation of the above 8 ultrasonographic characteristics,50-MHz ultrasonography was superior to 20-MHz ultrasonography (P =0.002).The common dermoscopic features of the 50 SK lesions were clear borders (n =50),comedo-like openings (n =45),ridge or cerebriform pattern (n =31),hairpin-like vessels (n =30),multiple milia-like cysts (n =24),moth-eaten border (n =21) and shiny white streaks (n =3).Under 50-and 20-MHz ultrasonography,the simple matching coefficients between enhanced hyperechoic masses or spots in the stratum corneum and comedo-like openings under dermoscopy were 42％ (21) and 20％ (10) respectively,and the simple matching coefficients between internal hyperechoic spots and multiple milialike cysts (＞ 3) under dermoscopy were 58％ (29) and 48％ (24) respectively.Conclusion Highfrequency skin ultrasonography and dermoscopy both are of great value to the assessment of SK lesions,and 50-MHz ultrasonography is superior to 20-MHz ultrasonography for imaging skin lesions.
