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Detection of unexpected emergency diseases using FDG-PET/CT in oncology patients

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Japanese Journal of Radiology Aims and scope Submit manuscript

Abstract

Purpose

To evaluate the frequency of emergency diseases that were detected unexpectedly using FDG-PET/CT.

Materials and methods

Interpretation reports for 11,663 FDG-PET/CT studies in our hospital were retrospectively reviewed. Patients with major emergency diseases were extracted according to the following exclusion criteria: (1) relevant findings had been recognized prior to the PET/CT; (2) an intervention or operation that may have been relevant to the present findings was performed within 1 month prior to the PET/CT; and (3) the clinical course could not be investigated sufficiently (e.g., in cases where the patients were introduced from other hospitals).

Results

Forty-one patients (0.35%) with unexpected emergency diseases were identified. The most frequent disease was pneumothorax (8 patients), followed by chronic subdural hematoma (CSH) (7 patients), ureteral stone (7 patients), and abdominal aortic aneurysm (AAA) with a dirty fat sign or a high-attenuation crescent sign visualized on CT (4 patients). Nine patients (2 pneumothorax, 3 CSH, 1 cerebral hemorrhage, 1 acute cholecystitis, 1 acute pancreatitis, and 1 acute appendicitis) were hospitalized and/or underwent therapeutic intervention within 1 week after the PET/CT.

Conclusion

Although rare, an unexpected emergency disease requiring urgent management can be detected using FDG-PET/CT in oncology patients.

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Authors and Affiliations

  1. Department of Diagnostic Radiology and Nuclear Medicine, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan

    Akira Toriihara, Emi Yamaga, Masashi Nakadate, Jun Oyama & Ukihide Tateishi

Authors
  1. Akira Toriihara
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  2. Emi Yamaga
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  3. Masashi Nakadate
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  4. Jun Oyama
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  5. Ukihide Tateishi
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Corresponding author

Correspondence to Akira Toriihara.

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Conflict of interest

The authors declare that they have no conflict of interest.

Funding

We have no grant funding nor any financial relationships to disclose.

Informed consent

Our institutional review board has approved this retrospective study, and the need for written informed consent was waived (IRB approval number: M2016-181).

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Toriihara, A., Yamaga, E., Nakadate, M. et al. Detection of unexpected emergency diseases using FDG-PET/CT in oncology patients. Jpn J Radiol 35, 539–545 (2017). https://doi.org/10.1007/s11604-017-0664-5

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  • DOI: https://doi.org/10.1007/s11604-017-0664-5

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