Melanonychia Striata = تصبغ الظفرالميلاني بشكل خطي
Melanonychia
Melanonychia is due to the presence of melanin in the nail plate. It can be caused by activation or proliferation of nail matrix melanocytes. In most cases melanonychia appears as a single or longitudinal brown to black band. Multiple bands of melanonychia are usually due to melanocyte activation, as is seen in darker-skinned individuals, pregnant women, those with inflammatory nail