PMC3608179_01
Radiograph of the patient's left knee in anteroposterior (a) and lateral (b) view.
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fig1
A previous plain radiograph of the patient's knee in two projections was considered to be negative (Figure 1).
Three-phase scintigraphy showing a picking up area on the superior part of the patella.
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fig2
A three-phase scintigraphy was taken and it revealed a picking up area on the superior part of the left patella (Figure 2).
(a) Axial, (b) sagittal, and (c) coronal CT scans show a round, well-marginated sclerotic lesion of about 8 mm with a hypodense rim and a centrally calcified nidus.
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This image was consistent with an osteoid osteoma (Figure 3).
Postoperative CT scans confirm the disappearance of the nidus ((a) axial; (b) sagittal; (c) coronal view).
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Postoperative CT scan confirmed that the nidus was entirely removed (Figure 4). 