患者女，８０岁。６年前右足跟部出一黄豆大疣状突起，表面较粗糙，无炎症表现，境界清，诊断寻常疣，未做特殊处理。穿鞋摩擦压迫，有时碰撞后出少量鲜血稍有疼痛感，渐消失，饮食活动如常。近１年多损害渐增大，有白色粘稠分泌物渗出，伴特殊臭味，穿鞋困难，行动不便。体检 The patient is 80 years old. Six years ago, the right heel showed a large pod-like bulge in the heel, and the surface was rough, no inflammation, clear boundary, diagnosis of common warts, and no special treatment. Wear shoes friction oppression, sometimes a small amount of blood after the collision, a little pain, gradually disappeared, eating activities as usual. In the last year or so, the damage gradually increased, and white sticky secretions oozing out, with special odors, difficulty in wearing shoes, and mobility inconvenience. Medical examination