Delayed diagnosis of ascending colon mucinous adenocarcinoma with local abscess as primary manifestation: Report of three cases

Figure 1 Case 1. A: The incision of the right waist was cracked and inflamed; B: Abdominal computed tomography showed a mass between the psoas muscle and the ascending colon, and a drainage tube was visible; C and D: Abdominal MRI showed an irregular mass with a long T1 and long T2 signal in the right posterior abdominal para-vertebral region; E: A horseshoe-shaped mass in the ascending colon; F: Pathology of the colonic mucinous adenocarcinoma (hematoxylin-eosin staining, 20 ×).