Catheter-Related Thrombosis With Extremely High FDG Uptake on 18 F-FDG PET
Sho Ishikawa1, Ryusuke Nakamoto2, Takeshi Yamamoto3
1From the Department of Diagnostic Radiology, Japanese Red Cross Wakayama Medical Center, Wakayama, Japan.
Abstract:
A 38-year-old woman with exertional dyspnea and decreased ejection fraction underwent 18 F-FDG PET/CT, which showed extraordinarily high FDG uptake in a catheter-related thrombus formed along a central venous catheter. The thrombus's uptake (SUV max , 127.3) was comparable to or greater than uptake seen in the bladder's urine. This abnormal uptake was unusual for thrombi, suggesting additional factors like undiluted FDG solution stasis due to a fibrin sheath formation around the catheter and first-pass effect. A new peripheral venous route should be secured to administer FDG in case of suspected catheter-related thrombus to avoid potential complications including a pulmonary embolism.
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