الفهرس 
Clinical Aspects of Osteoid OsteomaOnly 14 pages are availabe for public view
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Abstract
Osteoid osteomas are relatively common bone lesions accounting for approximately 10% to 12% of all benign bone tumors and 2% to 3% of all primary bone tumors. The male-to-female ratio is 2:1. It is generally a condition of young people.
The lower extremities are the most common sites of osteoid osteomas. Ten percent to 25% of all cases occur in the spine.
The classic presentation includes focal skeletal bone pain, which worsens at night and is frequently relieved with a small dose of aspirin.
Histologically, these lesions consist of a central area of vascularized connective tissue, nidus, which is largely occupied by active, differentiated osteoblasts that produce osteoid or bone. Multinucleated osteoclast can also be encountered as part of active bone remodeling..
The lesions appear as small heamorrhagic, berry like, granular lesions.
Different radiological aspects characterize osteoid osteoma and are therefore used to confirm or even to diagnose the tumor .
Simple Radiography is the initial examination of choice and may be the only examination required.
Computed Tomography (CT) is used for precise localization of the nidus and may be used for guiding percutaneous ablation
Magnetic resonance imaging (MRI) is a useful imaging technique, but CT appears superior for precise localization
Angiography may be useful in differentiating the tumor from a Brodie abscess.
Single photon emission computed tomography (SPECT) is useful in the localization of the tumor when the spinal arch or spinous process is involved.
Radionuclide scanning for technetium (Tc99m) diphosphonate uptake shows fairly intense activity at the tumor site. This examination may also be used to localize the tumor preoperatively and to establish complete removal of the nidus by using a hand-held radioactivity detector.
Osteoid osteomas may undergo spontaneous regression after several years of observation.the treatment option includes medical,traditional surgical manner and percutaneous methods.
The open resection method has several drawbacks including weakening of the bone , possibility of reccurence, and immobilization ..
Percutaneous techniques are divided into two groups: those that attempt to remove the lesion physically,and those that aim at in-situ destruction (ablation)