Clinical orthopaedics and related research
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Clin. Orthop. Relat. Res. · Mar 1990
Case ReportsSubtalar arthralgia caused by juxtaarticular osteoid osteoma.
Juxtaarticular osteoid osteomas in the ankle are frequently misdiagnosed because their symptoms mimic arthritis and may precede roentgenographic findings. In addition, these tumors are rare compared to arthritis and other sources of ankle pain. ⋯ The use of plain tomograms, thin-section computed tomograms, and radionuclide scans aid an early and correct diagnosis. Arthroscopy and arthrotomy are often inappropriate.
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Luxatio erecta humeri is a rare type of glenohumeral dislocation. The pathomechanics of this injury involve either direct axial loading on a fully abducted extremity or leverage of the humeral head across the acromion by a hyperabduction force. The clinical presentation of this type of shoulder dislocation is unique, with the affected extremity held rigidly above the head in abduction. ⋯ Concomitant fracture of the acromion, clavicle, coracoid, greater tuberosity, and humeral head may also be seen. A computed tomography scan of the case reviewed here revealed a large humeral head defect oriented perpendicular to the classic Hill-Sachs lesion. Luxatio erecta humeri is associated with significant late morbidity, including recurrent dislocation, instability, and adhesive capsulitis.