Systemic disease can produce changes in the nails Perhaps the best known example of this is koilonychia as a sequale of iron deficiency anemia "Half and half nail" is a type of pseudoleuconychia that can be caused by chronic renal disease, Kawasaki's disease, cirrhosis, and zinc deficiency It has Internal diseases and nutritional deficits can cause changes in the appearance of the nails Half and half nails MedlinePlus Medical Encyclopedia Image Skip navigationLongitudinal nail splitting is an extension of ridging seen in psoriasis, a fungal nail infection or lichen planus Distal splitting in association with a pigmented or red linear band can be a sign of onychopapilloma
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