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A and B. Contrast-enhanced CT of the abdomen and pelvis: showed a large fat-containing mass next to the sigmoid colon (asterisk) surrounded by fat stranding (arrow). C. Contrast-enhanced CT of the abdomen and pelvis: performed 7 years before the admission were retrieved from our digital archive and the comparison demonstrated that the lesion (asterisk) was smaller and located medial and posterior within the pelvis; and there was no fat stranding (arrow).
