Fig. 31From: Primary and secondary tumors of the peritoneum: key imaging features and differential diagnosis with surgical and pathological correlationIntra-abdominal fibromatosis in a 67-year-old man. a, b Axial CT images in the portal phase show two nodular solid masses in the small bowel mesentery and the left greater omentum (red arrows). Note the mixed density of the big mesenteric mass, due to the combination of hypodense myxoid material (black asterisk) and dense collagenous material (white asterisk) within its stroma. c H&E stain photomicrograph shows a poorly cellular lesion without atypia or necrosis, within a background of fibrous stromaBack to article page