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First published online April 15, 2008, 10.2967/jnumed.107.047142
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Journal of Nuclear Medicine Vol. 49 No. 5 708-712
© 2008 by Society of Nuclear Medicine
doi: 10.2967/jnumed.107.047142

Clinical Investigation

Comparison of 18F-FDG PET and MRI in Assessment of Uterine Smooth Muscle Tumors

Yoshio Yoshida1, Tetsuji Kurokawa1, Yoko Sawamura1, Akiko Shinagawa1, Tetsuya Tsujikawa2, Hidehiko Okazawa2, Tatsuro Tsuchida3, Yoshiaki Imamura4, Narufumi Suganuma5 and Fumikazu Kotsuji1

1 Department of Obstetrics and Gynecology, Faculty of Medical Sciences, University of Fukui, Fukui Prefecture, Japan; 2 Biomedical Imaging Research Center, Faculty of Medical Sciences, University of Fukui, Fukui Prefecture, Japan; 3 Department of Radiology, Faculty of Medical Sciences, University of Fukui, Fukui Prefecture, Japan; 4 Department of Pathology, Faculty of Medical Sciences, University of Fukui, Fukui Prefecture, Japan; and 5 Department of International Social and Health Sciences, Faculty of Medical Sciences, University of Fukui, Fukui Prefecture, Japan

Correspondence: For correspondence or reprints contact: Yoshio Yoshida, Department of Obstetrics and Gynecology, Faculty of Medical Sciences, University of Fukui, 23-3 Matsuoka-Shimoaizuki, Eiheiji-cho, Yoshida-gun, Fukui Prefecture, Japan 910-1193. E-mail: yyoshida{at}u-fukui.ac.jp

The purpose of this study was to prospectively determine whether combined MRI and 18F-FDG PET is more accurate than MRI in assessing nonbenign uterine smooth muscle tumors (USMTs). Methods: Seventy patients (mean age, 49 ± 10 y; range, 28–77 y) suspected of having nonbenign USMTs underwent both MRI and 18F-FDG PET before surgery. Results were evaluated using receiver-operating-characteristic (ROC) analyses and the Cochran Q test. Results: The area under the ROC curve for MRI with 18F-FDG PET was significantly higher than that for MRI (0.97 vs. 0.89, P < 0.05). Although multiple comparisons using the Cochran Q test were not significant, the sensitivity, specificity, and accuracy for MRI with 18F-FDG PET with probable nonbenign USMT cases considered to be positive were higher than those for MRI (93.3% vs. 73.3%; 92.7% vs. 85.5%; and 92.9% vs. 82.9%, respectively). Conclusion: MRI with 18F-FDG PET is useful in assessing nonbenign USMTs, as compared with MRI.

Key Words: genitourinary • oncology • PET • MRI • PET/MRI • 18F-FDG-PET • uterine smooth muscle tumors

COPYRIGHT © 2008 by the Society of Nuclear Medicine, Inc.


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