供区如不能直接拉拢缝合，可取断层皮片修复供区创面。
The donor area which could not be sutured directly were repaired by segmented grafts.
结论采用分期断层皮片移植治疗耳廓大面积黑色素痣，方法简单，疗效可靠。
Conclu sion Treatment of large-sized auricular nevus through staged split -thickness skin grafting over perichondrium is simple and reliable.
方法取健康活杀小猪断层皮片，经特殊处理去除表皮和真皮中的细胞成分，制成脱细胞异种真皮基质。
Methods Xenogenic acellular dermal matrix was made from fresh pig skin which had removed the cells and the cell debris by some extraordinary methods.
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