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The authors report a case of a late repair of a missed, large, osteochondral fracture of the femoral trochlea in a 14-year-old boy due to lateral patellar dislocation after a twisting injury of the knee a year ago. The late—1 year after the knee injury—imaging assessment of the patient regarding radiograph images, CT scan, and MRI was misleading, misinterpreted, and failed to reveal this osteochondral fracture. The free osteochondral fragment was detected during diagnostic arthroscopy. Open reduction and fixation of the osteochondral fragment with bioabsorbable pins were done, and healing was achieved within an acceptable time. The patient's clinical and imaging examination with knee MRI, a year after the surgical treatment, was highly satisfactory. Fixation with bioabsorbable pins showed to be a worthwhile option in this case. The technique used was straightforward, with excellent short- and long-term results. Bioabsorbable pins may be used to restore successfully even an old, large osteochondral fracture in the immature skeleton.

Madelung deformity is a complex malformation of the wrist, due to growth disturbance in the volar and ulnar part of the distal radial physis. We report a bilateral idiopathic Madelung wrist deformity, in a 13-year-old girl, corrected surgically with the Taylor spatial frame external fixation system plus osteotomy. The Taylor spatial frame,a hexapod system of external fixation, has the ability, by distraction histogenesis, to simultaneously correct all components of this multiplanar three-dimensional wrist deformity, restoring gradually the distal radius morphology and radiocarpal alignment. Furthermore, the hexapod system, assisted with a web-based software program, allowed for, any time during the correction procedure, all proper modifications of the prescription needed, for the deformity correction. With this surgical technique, we achieved a full correction of the bilateral Madelung deformity and restored good function.

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An aneurysmal bone cyst (ABC) is a benign, locally destructive hemorrhagic lesion, usually eccentrically located in the metaphysis of the long bones. A variety of treatments are available for the aggressive forms of aneurysmal bone cysts, ranging from curettage to en bloc resection technique in which the bone defect is reconstructed with vascularized or nonvascularized bular autograft or allograft.We report a case of a 12-year-old boy with an aggressive ABC of the proximal humerus. This aggressive form of ABC had penetrated the proximal growth plate of the humerus and had expanded to the humeral epiphysis, up to the subchondral bone of the humeral head. He had been treated surgically, with an aggressive, high-speed endoscopic curettage and bone grafting of the cyst. To assess the functional recovery of the patient, the Modi ed Musculoskeletal Tumor Society Score was used. Successful healing of the ABC of the proximal humerus was evident four months postoperatively. The Modi ed Musculoskeletal Tumor Society Score was increased from 21 points preoperatively to 30 points, ve years postoperatively.Endoscopic high-speed curettage allows a precise, thorough, and aggressive resection of the pathological tissue, which is essential for the successful healing of an aggressive ABC.