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. 2014 May 4;2014:952843. doi: 10.1155/2014/952843

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Copyright © 2014 Artor Niccoli-Asabella et al.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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A 76-year-old male with an eccentric lesion, 30 mm in length, localized 2 cm from the anal verge (G3, cT3N0). Baseline ¹⁸F-FDG PET/CT MIP (a) and sagittal images (b) showed the rectal lesion with a 12.9 value for SUVmax, 5.4 for SUVmean, and 1.5 SD (green arrows). The post-nCRT ¹⁸F-FDG PET/CT MIP (c) and sagittal images (d) showed, in the same site (green arrows), the persistence of ¹⁸F-FDG pathological uptake (SUVmax 11.8, SUVmean 5.4, and SD 1.5). Histological specimen analysis showed (y)pT3N0 M0, TGR4, and R0 and the patient was classified as a nonresponder. In this patient ΔSUVmax, ΔSUVmean, RImax, and RImean results were 1.10, 0, 8.5, and 0%, respectively.