患者男，25岁。因右手掌肿块7个月人院。l年前同部位出现蚕豆大肿块，在当地县医院切除，未作病检。术后不久，原部位又长出肿块且逐渐增大。外科检查，右手掌掌侧近食指掌指关节处肿块鸡蛋大，活动差，无压痛，其皮肤呈青紫色，食指曲屈困难。X线检查：骨质未见异常。术中见肿 Male patient, 25 years old. Due to a right hand mass for a 7-month hospital. A large lump of faba bean appeared at the same site l years ago and was removed at the local county hospital. No medical examination was performed. Shortly after the operation, the original site developed a mass and gradually increased. Surgical examination showed that the metacarpophalangeal joint of the right palm of the metacarpophalangeal portion of the palm of the right palm had large lumps of eggs, poor activity, and no tenderness. The skin was blue-purple and the index finger was difficult to bend. X-ray examination: no abnormal bone. Intraoperative see swelling