Abstract：
BACKGROUND: Diagnosis of persistent erythematous, scaly patches, or plaques can be complex since psoriasis (Ps), eczematous dermatitis (ED), and mycosis fungoides (MF) can be considered. Dermoscopy, which is a noninvasive diagnostic tool, is commonly used to examine blood vessels, scales, and background color; however, research on hair shaft evaluation in inflammatory dermatoses remains scarce. The aim of the study was dermoscopic evaluation of hair shafts in skin lesions localized on the non-scalp skin areas in patients diagnosed with MF, Ps, and ED.
METHODS: This was a retrospective evaluation of 55 patients diagnosed with MF, Ps, and ED. Photographic and dermoscopic documentation of these patients and detailed medical history were evaluated.
RESULTS: A total of 21 patients with MF, 21 patients with Ps, and 13 patients with ED were evaluated. The examination revealed the presence of various abnormalities of hair shafts (e.g., numerous pili torti, single pili torti, 8-shaped hairs, pigtail hairs, broken hairs, hair shafts rapidly tapered over long sections, hair shafts irregular in thickness, angulated hairs, branched hairs, the presence of trichorrhexis nodosa, and monilethrix-like hairs), yellow dots, and black dots. The presence of pili torti was found in 80% of patients with MF, compared with 16% of patients with Ps and 8% of patients with ED (p < 0.005), with multiple pili torti found only in MF patients (67%) (p < 0.005). Statistically significant differences also applied to hair shafts rapidly tapering over long sections and 8-shaped hairs, which occurred only in MF patients (p < 0.005 and p = 0.035, respectively).
CONCLUSIONS: The presence of hair shaft abnormalities such as numerous pili torti, 8-shaped hairs, and hair shafts rapidly tapering over long sections is an important criterion that should be considered in the dermoscopic differentiation of the patchy/plaque mycosis fungoides and inflammatory dermatoses, such as psoriasis and eczematous dermatitis localized on the non-scalp skin areas.
METHODS: This was a retrospective evaluation of 55 patients diagnosed with MF, Ps, and ED. Photographic and dermoscopic documentation of these patients and detailed medical history were evaluated.
RESULTS: A total of 21 patients with MF, 21 patients with Ps, and 13 patients with ED were evaluated. The examination revealed the presence of various abnormalities of hair shafts (e.g., numerous pili torti, single pili torti, 8-shaped hairs, pigtail hairs, broken hairs, hair shafts rapidly tapered over long sections, hair shafts irregular in thickness, angulated hairs, branched hairs, the presence of trichorrhexis nodosa, and monilethrix-like hairs), yellow dots, and black dots. The presence of pili torti was found in 80% of patients with MF, compared with 16% of patients with Ps and 8% of patients with ED (p < 0.005), with multiple pili torti found only in MF patients (67%) (p < 0.005). Statistically significant differences also applied to hair shafts rapidly tapering over long sections and 8-shaped hairs, which occurred only in MF patients (p < 0.005 and p = 0.035, respectively).
CONCLUSIONS: The presence of hair shaft abnormalities such as numerous pili torti, 8-shaped hairs, and hair shafts rapidly tapering over long sections is an important criterion that should be considered in the dermoscopic differentiation of the patchy/plaque mycosis fungoides and inflammatory dermatoses, such as psoriasis and eczematous dermatitis localized on the non-scalp skin areas.
摘要：
背景：诊断为持续性红斑，鳞状斑块,或斑块可能是复杂的，因为牛皮癣(Ps)，湿疹性皮炎（ED），和真菌病（MF）可以考虑。皮肤镜,这是一种非侵入性诊断工具，通常用于检查血管，scales,和背景颜色;然而，关于炎性皮肤病中毛干评估的研究仍然很少。该研究的目的是对被诊断为MF的患者的非头皮皮肤区域的皮肤病变中的毛干进行皮肤镜评估，PS,和ED。
方法：这是55例确诊为MF的患者的回顾性评估，PS,和ED。评估了这些患者的摄影和皮肤镜检查文件以及详细的病史。
结果：共有21例MF患者，21例PS患者，对13例ED患者进行了评估。检查显示存在各种毛干异常(例如，众多的pilitorti，单pilitorti,8形的头发，猪尾毛,破碎的头发,毛干在长段上迅速变细，毛干厚度不规则，成角度的毛发,分支的毛发，结节性三七的存在，和类似monilethrix的头发)，黄色圆点,和黑点。在80％的MF患者中发现了菌毛的存在，与16%的PS患者和8%的ED患者相比(p<0.005)，仅在MF患者中发现多个菌毛（67％）（p<0.005）。统计学上的显着差异也适用于在长切片和8形头发上迅速变细的毛干，仅在MF患者中发生（分别为p<0.005和p=0.035）。
结论：毛干异常的存在，例如许多毛毛，8形的头发，和毛干在长切片上迅速变细是一个重要的标准，应该考虑在皮肤镜下分化的斑片状/斑块型真菌病和炎症性皮肤病，如牛皮癣和湿疹性皮炎位于非头皮皮肤区域。
方法：这是55例确诊为MF的患者的回顾性评估，PS,和ED。评估了这些患者的摄影和皮肤镜检查文件以及详细的病史。
结果：共有21例MF患者，21例PS患者，对13例ED患者进行了评估。检查显示存在各种毛干异常(例如，众多的pilitorti，单pilitorti,8形的头发，猪尾毛,破碎的头发,毛干在长段上迅速变细，毛干厚度不规则，成角度的毛发,分支的毛发，结节性三七的存在，和类似monilethrix的头发)，黄色圆点,和黑点。在80％的MF患者中发现了菌毛的存在，与16%的PS患者和8%的ED患者相比(p<0.005)，仅在MF患者中发现多个菌毛（67％）（p<0.005）。统计学上的显着差异也适用于在长切片和8形头发上迅速变细的毛干，仅在MF患者中发生（分别为p<0.005和p=0.035）。
结论：毛干异常的存在，例如许多毛毛，8形的头发，和毛干在长切片上迅速变细是一个重要的标准，应该考虑在皮肤镜下分化的斑片状/斑块型真菌病和炎症性皮肤病，如牛皮癣和湿疹性皮炎位于非头皮皮肤区域。
