病人女,27岁,农民,入院前10个月左足部疼痛,病后2月足背外侧长一指头大肿物,伴疼痛,不敢走路。1985年2月15日入院。查肿物位于外踝前下方,约5×7cm中度硬,足外侧亦可摸到界线不清肿物,与前肿物相连,质软如海绵,不移动,无波动,压痛(+)。X线平片见距舟、跟骰,骰舟关节间隙增宽,轻度脱钙。穿刺抽出少许暗褐色液体。术中见外踝前下方指头大肿物,内含聚集增生结节,滑膜肥厚呈棕红色,表面为不平的纤维绒毛样组织。增生滑膜向跟骰、距舟、骰舟关节延伸。手术切除突出跗骨表面肿物及跗间关节的增生滑膜组织。病理诊断;色素性绒毛结节状滑膜炎。术后切口一期愈合,左足疼痛消失。3周后负重走 The patient female, 27 years old, was suffering from pain in his left foot 10 months before admission. He had a large mass of fingers on the lateral side of the foot in February after the illness. He had pain and was afraid to walk. Admitted to hospital on February 15, 1985. The tumor was located in the lower part of the lateral malleolus. It was approximately 5 × 7 cm moderately stiff. The lateral border of the foot could also be touched with unclear masses. It was connected with the anterior mass. The mass was soft, such as a sponge. It did not move, no waves, and tenderness (+). X-ray film seen from the boat, Achilles tendon, sacral joint space widened, mild decalcification. Piercing took a little dark brown liquid. In the operation, the large digits of the front and bottom digits of the lateral malleolus were included, and the clusters contained accretionary nodules. The synovial hypertrophy was brownish red, and the surface was an uneven fiber fibril-like tissue. The synovial membrane extends toward the Achilles tendon, from the boat, and from the boat joint. Surgical resection of the tumor surface of the humerus and the synovial tissue of the intercondylar joint. Pathological diagnosis; pigmented villonodular synovitis. After the incision healed for the first time, the pain in the left foot disappeared. After 3 weeks, take a heavy load