Abstract
Objective
To evaluate whether the presence of a feeding vessel in proximity to osteoid osteomas of long bones on multidetector CT (MDCT) can be an adjuvant clue for the diagnosis of osteoid osteoma.
Materials and methods
Forty-nine CT scans of patients with radiological and clinical diagnosis of osteoid osteoma of long bones and a control group of 20 CT scans of patients with cortical-based lesions other then osteoid osteoma were analyzed. Two radiologists evaluated the CT images in consensus for the presence of a blood vessel in the same axial slices in which the nidus of osteoid osteoma was seen and to determine the incidence.
Results
In 39 cases (79.6%) of osteoid osteoma, a blood vessel either entered the nidus (23 patients) or was seen in proximity to it (16 patients). This was significantly different (P < 0.05) from the cortical-based lesions, in which only two CT scans (10%) showed a blood vessel in the lesion’s proximity.
Conclusion
In the majority of osteoid osteoma lesions in long bones, a blood vessel can be seen on MDCT either entering the nidus itself or in its proximity. The role of this vessel in the lesion pathogenesis and whether it improves diagnostic accuracy need further evaluation.
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The authors declare that they have no conflict of interest. Authors have nothing to disclose. The study was not financed or supported by any commercial body.
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Gal Yaniv and Noga Shabshin contributed equally to this article
While our paper was being reviewed, a similar observation was published by Liu et al. in AJR 2011;196(1):168–73.
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Yaniv, G., Shabshin, N., Sharon, M. et al. Osteoid osteoma—the CT vessel sign. Skeletal Radiol 40, 1311–1314 (2011). https://doi.org/10.1007/s00256-011-1150-2
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DOI: https://doi.org/10.1007/s00256-011-1150-2