Foot & ankle international
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We report five cases of intra-articular osteoid osteoma. Physical findings of osteoid osteoma vary with the site of the tumor. Juxta- and intra-articular osteoid osteomas present various atypical and nonspecific features. ⋯ When the diagnosis is suspected, we suggest that the most sensitive test is a "three-phase" technetium-99m bone-scan followed by computerized tomographic-scanning. Detailed evaluation of the suspected area, using thin sections is required to prevent misinterpretation, especially in a diagnosis involving first sprain of an ankle. The following cases of intra-articular osteoid osteoma illustrate the problems encountered in their diagnosis.