• Source: Half and half nail

half" target="_blank">Half and half" target="_blank">half nails (also known as "Lindsay's nails") show the proximal portion of the nail white and the distal half" target="_blank">half red, pink, or brown, with a sharp line of demarcation between the two halves.: 785  The darker distal discoloration does not fade on pressure, which differentiates Lindsay's nails from Terry's nails. The discoloration is thought to be due to β-melanocyte–stimulating hormone. Seventy percent of hemodialysis patients and 56% of renal transplant patients have at least one type of nail abnormality. Absence of lunula, splinter hemorrhage, and half" target="_blank">half and half" target="_blank">half nails were significantly more common in hemodialysis patients, while leukonychia was significantly more common in transplant patients.: 785 : 659 




Signs and symptoms


half" target="_blank">Half and half" target="_blank">half nail is when the distal portion of the nail is reddish brown, while the proximal area is white.




Causes


half" target="_blank">Half and half" target="_blank">half nail is seen in 15-50% of chronic renal failure patients. It has also been associated with yellow nail syndrome, hyperthyroidism, pellagra, HIV infection, Crohn's disease, Kawasaki's disease, Behcet's disease, cirrhosis, and even in healthy individuals.




Treatment


As the symptom itself is benign from the medical point of view, treatment is limited to cosmetic measures.




See also


List of cutaneous conditions




References






Further reading


Aouali, Soraya; Sefraoui, Saida; Zizi, Nada; Dikhaye, Siham (2021). "half" target="_blank">Half and half" target="_blank">half nail, is it a marker of severe COVID-19 infection?". Annals of Medicine and Surgery. 71. Ovid Technologies (Wolters Kluwer Health): 102963. doi:10.1016/j.amsu.2021.102963. ISSN 2049-0801. PMC 8519785.
Huang, W.-T.; Wu, C.-C. (2009-03-17). "half" target="_blank">Half-and-half" target="_blank">half nail". Canadian Medical Association Journal. 180 (6). CMA Joule Inc.: 687–687. doi:10.1503/cmaj.081312. ISSN 0820-3946. PMC 2653574.




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