PMC7653002_01
Antero-posterior (AP) Plain x-ray shows an ill-defined lesion at the glenoid without erosion nor periosteal reaction.
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Plain x-ray of right shoulder showed an ill-defined lucency at the inferior glenoid with intact articular surface with no erosion, nor periosteal reaction or mass lesion (Fig. 1).
CT scan shows a well-defined osteolytic lesion in the inferior glenoid with central nidus, which is typical of osteoid osteoma.
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No definite periosteal reaction or soft tissue component to suggest aggressive lesion (Fig. 2).
Magnetic resonance imaging (MRI) images of the shoulder. A: T1 axial cut of the joint. It shows low signal intensity lesion in the glenoid. B: T2 axial cut. It shows high signal intensity mainly at the periphery. C: Postcontrast T1 sagittal cut. It demonstrates an intense enhancement of the lesion.
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The rotator cuff muscles are grossly unremarkable (Fig. 3).
Follow-up plain radiographs. A: Anteroposterior view of right shoulder. B: Scapular view of the right shoulder.
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Plain x-rays of the last follow-up visit are shown in (Fig. 4).