Dermoscopic Approach to a Small Round to Oval Hairless Patch on the Scalp
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Background: Various kinds of alopecia can show smallround or oval hairless patch. Dermoscopy could be a simple,useful tool for making a correct diagnosis. Objective: Theaim of this study is to investigate clinical usefulness ofdermoscopy for diseases with small round or oval hairlesspatch on the scalp. Methods: Dermoscopic examination wasperformed for 148 patients with small round or oval hairlesspatch using DermLiteⓇ II pro. The type and its patientnumber of alopecia investigated in the study were as below:alopecia areata (n=81), trichotillomania (n=24), tinea captis(n=13), traction alopecia (n=12), lichen planopilaris (n=8), discoid lupus erythematosus (n=7), congenital triangularalopecia (n=2) and pseudopelade of Brocq (n=1). Thesignificance of dermoscopic findings for each disease wereevaluated. Results: Characteristic dermoscopic findings ofalopecia areata were tapering hairs and yellow dots. Thoseof trichotillomania and traction alopecia were broken hairs. Dermoscopic findings of tinea capitis included bent hairs,perifollicular white macules and greasy scales. Discoid lupuserythematosus and lichen planopilaris were characterizedby dermoscopic findings of lack of follicular ostia. Furthermore,keratin plugs were frequently seen in discoidlupus erythematosus whereas perifollicular hyperkeratosisand erythema were frequently seen in lichen planopilaris. Conclusion: Dermoscopic examination for small round oroval hairless patch showed characteristic findings for eachdisease. Based on these results, we propose dermoscopicalgorithm for small round or oval hairless patch on the scalp.
Abstract
Background: Various kinds of alopecia can show smallround or oval hairless patch. Dermoscopy could be a simple,useful tool for making a correct diagnosis. Objective: Theaim of this study is to investigate clinical usefulness ofdermoscopy for diseases with small round or oval hairlesspatch on the scalp. Methods: Dermoscopic examination wasperformed for 148 patients with small round or oval hairlesspatch using DermLiteⓇ II pro. The type and its patientnumber of alopecia investigated in the study were as below:alopecia areata (n=81), trichotillomania (n=24), tinea captis(n=13), traction alopecia (n=12), lichen planopilaris (n=8), discoid lupus erythematosus (n=7), congenital triangularalopecia (n=2) and pseudopelade of Brocq (n=1). Thesignificance of dermoscopic findings for each disease wereevaluated. Results: Characteristic dermoscopic findings ofalopecia areata were tapering hairs and yellow dots. Thoseof trichotillomania and traction alopecia were broken hairs. Dermoscopic findings of tinea capitis included bent hairs,perifollicular white macules and greasy scales. Discoid lupuserythematosus and lichen planopilaris were characterizedby dermoscopic findings of lack of follicular ostia. Furthermore,keratin plugs were frequently seen in discoidlupus erythematosus whereas perifollicular hyperkeratosisand erythema were frequently seen in lichen planopilaris. Conclusion: Dermoscopic examination for small round oroval hairless patch showed characteristic findings for eachdisease. Based on these results, we propose dermoscopicalgorithm for small round or oval hairless patch on the scalp.
참고문헌 (11)
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