Background

Onychotillomania is a nail-picking disorder characterized by nail dystrophy and abnormal morphology of the nail plate, nail bed, and periungual skin.

Objective

The purpose of this study was to describe the dermoscopic features of onychotillomania.

Methods

A retrospective study of the dermoscopy images of 36 patients affected by onychotillomania. The images were reviewed independently by both authors and a list of dermatoscopic findings was established.

Results

Scales were observed in 34 cases (94.4%); absence of nail plate was seen in 30 (83.3%); wavy lines were observed in 25 (69.4%); hemorrhages were observed in 23 (63.9%); crusts were seen in 22 (61.1%); nail bed pigmentation was observed in 17 (47.2%); speckled dots were observed in 14 (38.9%); nail plate melanonychia was observed in 4 (11.1%).

Limitations

Limitations included small sample size and retrospective study.

Conclusion

Absence of the nail plate with multiple obliquely oriented nail bed hemorrhages, nail bed gray pigmentation, and presence of wavy lines are characteristic findings of onychotillomania and not seen in other nail diseases.

中文翻译：

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甲癣的皮肤镜特征：36例研究

背景

甲癣是一种指甲采摘疾病，其特征在于指甲营养不良以及指甲板，甲床和趾周皮肤的形态异常。

客观的

这项研究的目的是描述甲癣的皮肤镜特征。

方法

回顾性研究36例甲癣患者的皮肤镜检查图像。两位作者均独立审查了图像，并建立了皮肤镜检查结果清单。

结果

观察量表的34例（94.4％）；30例中没有发现钉板（83.3％）；在25（69.4％）中观察到波浪线；23例中有出血（63.9％）；在22个中发现了硬皮（61.1％）; 观察到甲床色素沉着的比例为17（47.2％）；在14个斑点中观察到斑点（38.9％）；在4例中观察到指甲板黑色素沉着症（11.1％）。

局限性

局限性包括样本量小和回顾性研究。

结论

甲板缺乏多处倾斜取向的甲床出血，甲床灰色色素沉着和波浪线的存在是甲癣的特征性发现，在其他指甲疾病中未见。