例1 女,27岁,农民。左大腿内侧燙伤后遗留瘢痕24年,每年热天发痒、疼痛,抓破后渗出,经治疗好转。半年前,瘢痕发痒、红肿、疼痛、溃烂逐渐扩大,经多方治疗无效,门诊以“瘢痕癌变”收入院。系统检查未见异常。皮损见左大腿内侧约40cm×18cm的瘢痕,中段有10cm×17cm大小溃疡面,边周呈堤状肉芽增生,中 Example 1 Female, 27 years old, farmer. Twenty-four years left after the scald on the inside of the left thigh, itching, pain, and exudation after scratching, improved after treatment. Six months ago, the scars, swelling, pain, and ulceration of the scars gradually expanded. After being treated with multiple treatments, the outpatients were admitted to the hospital with “scar lesions.” No abnormal system check. The skin lesions showed a 40cm×18cm scar on the inside of the left thigh, a 10cm×17cm ulceration on the middle segment, and a bank-shaped granulation hyperplasia on the periphery.