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Clin Nucl Med. 2012 Sep;37(9):910-1. doi: 10.1097/RLU.0b013e31825b23c0.

False-positive FDG PET/CT due to liver parenchymal injury caused by a surgical retractor.

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Department of Radiology, Memorial Sloan-Kettering Cancer Center; and †Weill Cornell Medical College, New York, NY 10065, USA.


A 70-year-old man underwent partial gastrectomy with pathology demonstrating gastric follicular lymphoma. After surgery, a staging FDG PET/CT study demonstrated an FDG-avid low-attenuation band in the liver. Corresponding MRI demonstrated a high T2 signal abnormality. This was believed to represent liver parenchymal injury due to liver retraction during surgery. The patient was managed conservatively. MRI at 1 month of follow-up demonstrated resolution of the T2 signal abnormality. FDG PET/CT at 6 months of follow-up demonstrated resolution of FDG uptake. Tissue injury from surgical retraction can produce FDG-avid lesions that need to be distinguished from malignancy on PET/CT.

[Indexed for MEDLINE]

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