نتایج جستجو برای: melanonychia
تعداد نتایج: 147 فیلتر نتایج به سال:
A 75-year-old woman with a history of hydroxychloroquinetreated cutaneous lupus erythematosus presented with a bilateral sharply demarcated macular hyperpigmentation on both forearms (Fig. 1) and a partial melanonychia of the right thumb nail. This pigmentation disorder developed gradually over a 6-month period. No retinal pigmentation and no systemic disorder were revealed. Dermoscopy of the n...
The nail matrix contains melanocytes in the epidermal basal layer, but pigment is not visible in the gross anatomy of the nail plate in Caucasians. Hyperpigmentation due to an increase in melanogenesis, and subsequently melanin pigment, in the nail may be induced by certain drugs, tumours or endocrinological diseases (1-5). The whole nail may be affected, whilst some drugs or tumours produce lo...
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