Dermoscopy is a noninvasive and inexpensive method of magnifying in vivo examination of skin and nails allowing for immediate visualization of specific characteristics that could otherwise be overlooked by the naked eye. Dermoscopy, also known as dermatoscopy, surface microscopy, or epiluminescence microscopy, can evaluate the various structures of nails, such as the nail matrix, nail plate, nail bed, hyponychium, proximal nail fold, and distal edge of the nail plate. Dermoscopy of the nails has been also named onychoscopy. Nail psoriasis has a significant disease burden that is difficult to treat and can cause serious deformities which can lead to chronic dystrophy. Dermoscopy can be valuable in providing better detection of common abnormalities associated with particular diseases, directing management, and assessing response to treatment.
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