CT scan showing an<unk>  of the fibula with a clearly visible nidus Radiographs in<unk>  typically show a round lucency, containing a dense sclerotic central nidus (the characteristic lesion in this kind of tumor) surrounded by sclerotic bone. The nidus is seldom larger than 1.5 cm. The lesion can in most cases be detected on CT scan, bone scans and angiograms. Plain radiographs are not always diagnostic. MRI adds little to the CT findings which are useful for localisation. Radionuclide scanning shows intense uptake which is useful for localisation at surgery using a hand held detector, and for confirmation that the entire lesion has been removed.
Osteoid osteoma
Osteochondroma
Bone cyst
Osteoma
Aneurysmal bone cyst
Osteochondrosis
Osteoblastoma
Osteofibrous dysplasia