患者女性,49岁。始于高中时右踝部扭伤。1984年(35岁)发现右小腿下段近踝部进行增大的无痛性包块,质硬,不影响关节运动。外院拍片示“骨化性肌炎”,未作具体治疗。1990年3月,因包块进一步增大伴疼痛,在外院手术“局部病灶清除”。病理切片“骨化性肌炎”。1992年,原切口上方再 Female patient, 49 years old. Beginning in high school when the right ankle sprain. In 1984 (35 years old), an enlarged painless mass was found in the lower part of the right lower leg, which was hard and did not affect joint motion. The hospital film showed “ossification myositis” without specific treatment. In March 1990, because the mass was further increased with pain, the operation of the local lesion was removed in the external hospital. Pathological section “ossification myositis.” In 1992, the original incision above