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Semin intervent Radiol 2006; 23(1): 021-032
DOI: 10.1055/s-2006-939838
Copyright © 2006 by Thieme Medical Publishers, Inc., 333 Seventh Avenue, New York, NY 10001, USA.

Positron Emission Tomography for Staging and Assessment of Tumor Response of Hepatic Malignancies

Robert S. Hellman1 , Arthur Z. Krasnow1 , Gary S. Sudakoff1
  • 1Department of Radiology, Medical College of Wisconsin, Milwaukee, Wisconsin
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Publication Date:
04 April 2006 (online)

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ABSTRACT

18F-fluorodeoxyglucose (FDG) positron emission tomography (PET) is a useful functional imaging method that complements conventional anatomic imaging modalities for screening patients with colorectal hepatic metastases and hepatocellular cancer to determine their suitability for interventional procedures. FDG PET is more sensitive in detecting colorectal cancer than hepatocellular cancer (~90% versus ~50%). The likelihood of detecting hepatic malignancy with FDG PET rapidly diminishes for lesions smaller than 1 cm. The greatest value of FDG PET in these patients is in excluding extrahepatic disease that might lead to early recurrence after interventional therapy. Promising results have been reported with FDG PET that may show residual (local) or recurrent disease before conventional imaging methods in patients receiving interventional therapy. For patients with colorectal hepatic metastases, many investigators believe that patients with PET evidence of recurrent hepatic disease should receive additional treatment even when there is no confirmatory evidence present on other methodologies. For patients with hepatocellular cancer no conclusions regarding the value of FDG PET for assessment of response to interventional therapy can be reached as there is almost no published data.

KEYWORDS

PET - FDG - colorectal cancer - hepatocellular cancer

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Robert S HellmanM.D. 

Nuclear Medicine, Froedtert Hospital

9200 W. Wisconsin Avenue, Milwaukee, WI 53226