The Utility of Ultraviolet Dermoscopy in Identifying White Hairs in Children: A Diagnostic Aid

The article discusses the use of ultraviolet (UV) dermoscopy as a diagnostic tool to enhance the detection of white hairs in children, particularly in cases of pigmentary and autoimmune scalp disorders like alopecia areata. UV dermoscopy, which uses a Wood’s lamp, provides high contrast, making white hairs fluoresce brightly against a dark background, thus facilitating faster and more confident identification. This method has proven effective in early diagnosis of conditions such as pediatric vitiligo with leukotrichia and localized alopecia areata with depigmented regrowth. A multicenter study cited in the article found that UV dermoscopy improved the visualization of depigmented regrowing hairs, achieving a sensitivity of 92% compared to 68% with standard dermoscopy. The authors advocate for the incorporation of UV dermoscopy into pediatric evaluations when white hairs are suspected but not clearly visible.