Aggressive fibromatosis of the sigmoid colon: A case report

Figure 1 Computed tomography revealed a sigmoid mass. A: Noncontrast-enhanced phase; B: Arterial contrast phase; C: Venous phase. The arrow indicates the extraluminal sigmoid mass.

Figure 2 Colonoscopy and postoperative specimen. A: Colonoscopy revealed external compression in the sigmoid colon; B: Gross appearance of the postoperative specimen.

Figure 3 Pathological and immunohistochemical findings. A-C: Hematoxylin-eosin staining showed that the tumor cells displayed a fascicular or interwoven pattern (A) and infiltrated into the muscularis propria of the sigmoid colon (B) and the adipose tissue (C) (× 100); D-F: Representative images of immunohistochemical staining for β-catenin (D), CD117 (E) and Ki-67 (F) in tumor cells (× 100).