患者王某,男,46岁,门诊病人,右足底肿物反复发作长达24年,于1992年5月7日来本院就诊。既往于1968年时发现右侧足底生一肿物,无自觉症状,体积逐渐增大,呈外生性生长,当时约鸡蛋大小,于1978年在当地医院外科切除,术后2年又长出,生长较快,蔓延至整个右足底前部。患者平素身体健康,家族中无同样病史者,系统检查无异常。局部情况:右足底前部可见6×3cm、3×3cm、1×1cm、0.5×0.5cm、0.5×0.5cm肿块五块,呈外生性、结节性生长,表皮轻度角化,无触痛,温度不高,基底比瘤体小,瘤体触之稍硬。诊断为 Patient Wang, male, 46 years old, outpatient, recurrent right foot mass for up to 24 years, came to our hospital on May 7, 1992. Previously in 1968, a mass was found on the right foot with no subjective symptoms. The volume gradually increased. It was exogenously grown. At that time, it was about the size of an egg. In 1978, it was surgically removed at a local hospital and developed after 2 years. It grows faster and spreads to the front of the entire right plantar. Patients were generally healthy and had no history of family history. There were no abnormalities in the system examination. Local conditions: 5 × 6×3cm, 3×3cm, 1×1cm, 0.5×0.5cm, and 0.5×0.5cm masses are visible in the front of the right plantar. It is exophytic and nodular. The epidermis is slightly keratinized. Pain, the temperature is not high, the substrate is smaller than the tumor, and the tumor touches slightly harder. diagnosed as