Dermoscopy in Nails

Dermoscopy is a noninvasive diagnostic tool that is currently being used for different skin lesions, several inflammatory \& infectious diseases, and skin appendages disorders. ") In daily practice, dermoscopy may confirm clinical diagnosis and guides in the management of nail diseases, permitting a better visualization of symptoms. (2) Nail dermoscopy (Onychoscopy) was initially used only in the assessment of nail pigmentation, but now it is widely utilized for the evaluation of many nail disorders. (3) It enhances visible nail features; however, it can also help identify additional unique and fascinating features not visible to the naked eye. 2) Vitiligo is an acquired dyschromia of the skin in which there is loss of epidermal melanocytes The prevalence of vitiligo is approximately 0.1 - 2% worldwide. (5) Vitiligo is classified as segmental, acrofacial, generalized, and universal and less commonly mucosal and trichome.

Vitiligo has been described as a systemic disease. It has been associated with other autoimmune disorders as Diabetes (DM), Lupus, Psoriasis, Alopecia areata (AA), Hashimoto thyroiditis, and Gravesdisease.

Nails can show changes in association with many disorders such as renal, hepatic, pulmonary, autoimmune and collagen diseases. (67) Dermoscopic nail changes has been reported in several autoimmune disorders such as, in DM; longitudinal striations, pitting, onycholysis, \& splinter hemorrhage, (® in AA; scaly cuticle, punctate leukonychia, oncholysis, \&oncychoschizia®and in Collagen Vascular disorders; dilated capillaries, capillary dropout, and avascular areas. (10) To the best of our knowledge, dermoscopic nail changes in vitiligo haven't been reported yet. However, few studies had discussed clinical nail changes in vitiligo such as: (11) longitudinal ridging, absent lunula, leukonychia, pitting, in addition to less common nail changes such as flag sign and Terry's nails