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¹⁸F-FDG PET Detection of Colonic Adenomas

Department of Surgery, Tokai University School of Medicine, Kanagawa; and HIMEDIC Imaging Center at Lake Yamanaka, Hirano, Yamanashi, Japan

View larger version (27K): [in a new window]   FIGURE 1. Sites and sizes of 59 adenomas diagnosed by colonoscopic polypectomy. Numbers indicate adenoma sizes (mm) and underlines indicate PET-positive adenomas.

View larger version (149K): [in a new window]   FIGURE 2. (A) A 50-y-old asymptomatic man with focal FDG uptake in ascending colon (arrow). After PET study, he underwent colonoscopy, which revealed sessile polyp in ascending colon. Polypectomy was performed, and histopathologic study showed 11-mm villotubular adenoma with high-grade dysplasia. (B) On retrospective evaluation of PET images obtained 15 mo earlier, focal FDG uptake was identified at same site (arrowhead).

View larger version (111K): [in a new window]   FIGURE 3. A 49-y-old asymptomatic woman with focal FDG uptake in lower abdomen (arrow). Adenoma in sigmoid colon was suspected, but colonoscopic examination showed no abnormality. Arrowhead indicates FDG in left ureter.