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Peripheral nerve schwannoma: two cases exhibiting increased FDG uptake in early and delayed PET imaging

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Abstract

We present two cases of peripheral nerve schwannoma which showed an increased accumulation of 2-deoxy-[18F] fluoro-D-glucose (FDG) in the tumors on positron emission tomography (PET) imaging acquired at both 1 h (early phase) and 2 h (delayed phase) after FDG injection. FDG-PET scans were performed with a dedicated PET scanner (HeadtomeV/ SET2400 W, Shimadzu, Kyoto, Japan) and the PET data analyzed the most metabolically active region of interest (ROI). We set the maximum standardized uptake value (SUV max) with a cut-off point of 3.0 to distinguish benign and malignant lesions. Although the mechanism responsible for the increased FDG uptake in benign schwannomas remains unknown, we discuss our findings in the context of tumor cellularity and briefly review other studies on the subject.

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Authors and Affiliations

  1. Department of Nuclear Medicine and Tracer Kintetics, Osaka University Graduate School of Medicine, Suita, Osaka, Japan

    Kenichiro Hamada, Ichiro Higuchi & Jun Hatazawa

  2. Department of Radiology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan

    Atsuo Inoue

  3. Department of Orthopaedics Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan

    Kenichiro Hamada, Takafumi Ueda, Noriyuki Tamai, Akira Myoi & Hideki Yoshikawa

  4. Department of Pathology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan

    Yasuhiko Tomita & Katsuyuki Aozasa

Authors
  1. Kenichiro Hamada
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  2. Takafumi Ueda
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  3. Ichiro Higuchi
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  4. Atsuo Inoue
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  5. Noriyuki Tamai
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  6. Akira Myoi
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  7. Yasuhiko Tomita
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  8. Katsuyuki Aozasa
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  9. Hideki Yoshikawa
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  10. Jun Hatazawa
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Correspondence to Kenichiro Hamada.

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Hamada, K., Ueda, T., Higuchi, I. et al. Peripheral nerve schwannoma: two cases exhibiting increased FDG uptake in early and delayed PET imaging. Skeletal Radiol 34, 52–57 (2005). https://doi.org/10.1007/s00256-004-0845-z

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  • DOI: https://doi.org/10.1007/s00256-004-0845-z

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