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 ×).

Figure 2 Case 2. A: A sinus approximately 2 cm in size in the right inguinal region; B: The sinus on abdominal computed tomography; C: A mass in the right iliac fossa with unclear local and cecal boundaries; D: A horseshoe-shaped mass in the ascending colon; E: Pathology of the colon mucinous adenocarcinoma (hematoxylin-eosin staining, 20 ×).

Figure 3 Case 3. A: Abdominal computed tomography scan showed a mass that extended to the subcutaneous tissue, and the boundary with the intestine was unclear; B: A mass in the ascending colon in the lumen; C: Pathological examination confirmed colon mucinous adenocarcinoma (hematoxylin-eosin staining, 20 ×).