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Usefulness of FDG PET for Assessment of Early Recurrent Epithelial Ovarian Cancer

Song-Mee Cho1, Hyun Kwon Ha2, Jae Young Byun1, Jae Mun Lee1, Chan Joo Kim3, Sung Eun Nam-Koong3 and Joon Mo Lee3

1 Department of Radiology, College of Medicine, The Catholic University of Korea, Seocho-Ku, Seoul, South Korea.
2 Department of Radiology, University of Ulsan College of Medicine, Asan Medical Center, 388-1 Poongnap-Dong Songpa-Ku, Seoul, South Korea.
3 Department of Gynecology, College of Medicine, The Catholic University of Korea, 505 Banpo-Dong, Seocho-Ku, Seoul, South Korea.



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  		Fig. 1A. —41-year-old woman with recurrent ovarian cancer in pelvis. Contrast-enhanced CT scan obtained at level of hip joint shows two nodular enhancing lesions (arrows) in pelvis, one just above vaginal stump and second in left pelvic peritoneum. Both lesions were missed on CT.

 


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  		Fig. 1B. —41-year-old woman with recurrent ovarian cancer in pelvis. Regional axial FDG positron emission tomogram shows two nodular lesions (arrows) in pelvis.

 


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  		Fig. 2A. —39-year-old woman with recurrent ovarian cancer in peritoneum. Contrast-enhanced CT scan obtained at level of liver shows smooth linear contrast enhancement (arrows) along hepatic surface.

 


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  		Fig. 2B. —39-year-old woman with recurrent ovarian cancer in peritoneum. Contrast-enhanced CT scan obtained at level of mid abdomen shows subtle nodular linear contrast enhancement (arrows) at peritoneum along right paracolic gutter.

 


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  		Fig. 2C. —39-year-old woman with recurrent ovarian cancer in peritoneum. Whole-body coronal image of FDG positron emission tomograsm shows strong FDG uptake at hepatic surface (arrows) and peritoneum (arrowheads) along both paracolic gutters. Urine in bladder (B) also shows FDG uptake.

 


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  		Fig. 3. —Graph shows detection rates for specific tumor sizes on FDG positron emission tomography (dotted line) and CT (solid line). To calculate detection rates for specific tumor size, we included all nodules in denominator that were larger than tumor size. Tumor detection rates on CT for tumors of diameters 0.3-, 0.4-, 0.5-, 0.6-, and 0.7- cm significantly exceeded those for FDG PET (p < 0.05).

 

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