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Misreading and false positive in diagnosis of FDG-PET/CT in the abdominal region Kazuhiro Oguchi 1 1Radiology and Diagnostic Imaging Center Aizawa Hospital Keyword: FDG-PET , 偽陽性 , 偽陰性 pp.1139-1145
Published Date 2019/8/10
DOI https://doi.org/10.18888/rp.0000000977
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A lot of pitfalls are hiding in diagnosis of FDG-PET/CT in the abdominal region. The fact that some kind of tumor, like gastric cancer, hepatocellular carcinoma, renal cell carcinoma, and prostatic carcinoma shows weak uptake of FDG is well known. On the other hand, inflammatory change of organs and lymph nodes show hyper accumulation of FDG. This article presents our own cases which were difficult to diagnose. Liver abscess may occur after biliary drainage. It may show high uptake of FDG and mimic liver metastases. Small disseminated lesions are easily missed, and renal metastases are difficult to identify in the strong urinal FDG uptake. Fat necrosis that may occur after chemotherapy of malignant lymphoma shows strong FDG uptake. Consideration of the CT images, its irregular shape and low density, is important for accurate diagnosis. To prevent overlooking and overestimation, it is necessary not only to observe the images(PET, PET/CT, and CT)carefully, but also to compare them with the previous images and to take clinical information into account.


Copyright © 2019, KANEHARA SHUPPAN Co.LTD. All rights reserved.

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電子版ISSN 印刷版ISSN 0009-9252 金原出版

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