Fig. 2

Preoperative contrast-enhanced computed tomography (CT) and PET–CT. A CT revealed wall thickening in the rectum (arrow). There were no enlarged lymph nodes or distant metastases (a: axial, b: sagittal). Positron emission tomography CT (PET–CT) revealed abnormal accumulation of FDG at the rectal tumor (c). B Three-dimensional-CT angiography reveals the IMA arising from the SMA (a). The IMA is accompanied by the IMV (b). (IMA inferior mesenteric artery, SMA superior mesenteric artery, IMV inferior mesenteric vein, FDG fluorodeoxyglucose