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Small calvarial bone scan foci--normal variations.

J Harbert, R Desai

    Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine
    |October 1, 1985
    PubMed
    Summary
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    Small calvarial foci, observed in 0.7% of bone scans, are likely normal anatomical variations. These findings along skull sutures showed no signs of metastatic disease and remained stable over time.

    Area of Science:

    • Radiology
    • Nuclear Medicine
    • Skeletal Imaging

    Background:

    • Bone scintigraphy is a common diagnostic tool.
    • Incidental findings require careful interpretation to differentiate from pathology.

    Purpose of the Study:

    • To characterize small calvarial foci identified on bone scans.
    • To determine the nature and clinical significance of these findings.

    Main Methods:

    • Retrospective review of 3,000 bone scans.
    • Analysis of lesion location, size, and changes over time.
    • Correlation with skull radiographs and follow-up imaging.

    Main Results:

    • 21 (0.7%) small calvarial foci were identified.
    • 17 foci were located along skull suture lines.

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  • No evidence of metastatic disease was found; lesions were stable on follow-up.

    • Conclusions:

    • These intense calvarial foci likely represent normal anatomical variations.
    • Potential explanations include cartilaginous rests, sutural foramina, or enlarged Pacchionian granulations.