, Volume 2, Issue 1, pp 55-58
Date: 14 Feb 2006

Magnetic Resonance Imaging Diagnosis and Computed Tomography-Guided Radiofrequency Ablation of Osteoid Osteoma

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A 26-year-old male presented for magnetic resonance (MR) examination of the ankle for chronic ankle pain.

MR images of the ankle revealed marked intraosseous bone marrow hyperintensity involving the talus on the fast inversion recovery sequence (Fig. 1). In addition, at the anteromedial margin of the posterior facet of the talus, a round, sclerotic lesion was present with an associated mild to moderate reactive synovitis in the subtalar joint (Fig. 1). Findings were consistent with an osteoid osteoma. Fig. 1

Selected magnetic resonance (MR) images of the hindfoot demonstrating the osteoid osteoma. Sagittal fast spin echo image (a) demonstrates the central nidus and peripheral rim of reactive sclerosis (arrow). Sagittal fast inversion recovery sequence (b) again demonstrates the low-signal intensity (sclerotic) nidus (arrow); also, of note, is moderate reactive intraosseous edema in the talus. Axial fast spin echo MR image (c) demonstrates the lesion (arrow) along the posteromedial margin ...