PMC8633484_01
(A) Postoperative day 1 (black arrows show the fracture). (B) Plaster and Kirschner wire were removed after 1 month. (C,D) After 1 month of functional exercise (black arrows show the bone hyperplasia of the myositis ossificans [MO]). (E-I) The MO gradually disappeared, and merged with the humerus (white arrows show that the hyperplastic bone affecting elbow flexion gradually disappears).
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F1
Postoperatively, a long-arm posterior splint was placed with the elbow flexed 90 degrees (Figure 1A). The plaster was removed in the outpatient operating room 4 weeks later, and the Kirschner wire was removed (Figure 1B). Her mother had noticed a palpable mass inside the elbow, which was found to be a bone-like structure via X-ray radiography (Figures 1C,D). The patient was followed up five times in total, and the follow-up time points were 2018/10 (Figure 1E), 2018/12 (Figure 1F), 2019/3 (Figure 1G), and 2019/7 (Figure 1H). The last follow-up was 3 years after the surgery (Figure 1I), and clinical examination revealed no evidence of recurrence.