Figure 2.

Sixty-nine-year-old male patient with first diagnosis of NSCLC (TTF1 positive adenocarcinoma of the right lower lobe pT2a, pN0, M0) underwent FDG-PET/CT for staging. FDG-PET/CT scan displayed an incidental FDG-avid wall thickening of the rectum. (A) MIP image after the intravenous injection of 245 MBq ¹⁸F-FDG. (B) PET image of the rectum. (C) CT image of the rectum. (D) Fused PET/CT image of the rectum. After further investigations following the FDG-PET/CT, the wall thickening was histopathologically confirmed as microsatellite stable adenocarcinoma of the rectum T3 cN2 cM0, 5 cm oral to the anus.