临床资料患者,男,28岁。主因左足趾指状赘生物2年,于2011年8月20日就诊。2年前,无明显诱因左足第3趾近甲床处出现一肤色肿物,无痛痒等不适,无溃疡,皮损缓慢增大。患者既往体健,否认有外伤史。系统查体未见异常。皮肤科检查:左足第3趾近甲床处单发0.5cm×1cm指状凸起赘生物,表面轻度角化,近肤色,质硬(图1)。皮损组织病理检查示表皮角化过度,棘层肥厚,表皮突增宽呈分支状,真皮中可见与表皮垂直走行、增宽的胶原纤维束(图2a,2b)。诊断:获得性指状纤维角皮瘤。手术切除皮损后, Clinical data patients, male, 28 years old. Mainly because of left toe finger-like vegetation for 2 years, on August 20, 2011 treatment. 2 years ago, there is no obvious incentive to appear near the foot of the third toe of the left foot a color tumor, no itching and other discomfort, no ulcers, skin lesions increased slowly. Past patient health, denied a history of trauma. System examination showed no abnormalities. Dermatology examination: the third toe of the left foot near the nail bed single 0.5cm × 1cm finger raised vegetation, the surface of mild keratosis, near skin tone, hard (Figure 1). Histopathological examination of the skin lesions showed hyperkeratosis of the epidermis, acanthosis and epidermal processes. Branches of the epidermal processes were observed in the epidermis. The collagenous fiber bundles (Figure 2a and 2b) were observed in the dermis, which were perpendicular to the epidermis. Diagnosis: Acquired finger-type fibrosarcoma. Surgical removal of lesions,