Nail apparatus melanoma is rare in Caucasians, with an incidence rate of 1% to 2%, but in Japanese populations, it accounts for 8.7% of all melanoma cases.Because the most prevalent site is the thumb, functional and cosmetic reconstruction after surgical resection is important. Although no standard surgical treatment for nail apparatus melanoma has been established, radical surgery in a narrow surgical margin with the ordinal skin graft is generally used for in situ and minimally invasive nail apparatus melanoma. Artificial dermis composed of a collagen lattice with a sili-cone sheet can be grafted to the site after resection. Because granulation tissue fills in the defect within a few weeks after the first surgery, better reconstruction is achieved by performing a skin graft. Furthermore, precise pathologic examination can be performed during the application of artificial dermis.
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