Fig. 3From: Rectal cancer diagnosed after resection of isolated brain metastasisPreoperative image of rectal cancer. a Subcircumferential type 2 advanced carcinoma in the lower rectum. b Mid-sagittal plane of magnetic resonance imaging analysis of rectal cancer. c Abdominal computed tomography (CT) scan of circumferential wall thickening of the rectum and advanced metastasis to regional lymph nodes. d Positron emission tomography–CT showed no other obvious distant metastasisBack to article page