Wide excision deep to the subfascial layer and with a safety margin of 1cm was performed, and the skin defect was covered with a free groin flap.

• 病灶处于是进行广泛切除，往下切至肌膜下层，并保留安全边缘1公分，皮肤缺陷覆以腹股沟自由皮瓣。