Giant transverse colonic mesenteric mucinous liposarcoma combined with rectal cancer and aortic coarctation: A case report and review of literature

Figure 1 Preoperative ancillary investigations following hospital admission and ancillary investigations before discharge. A: Contrast-enhanced abdominal computed tomography (CT) showing a large intra-abdominal tumor measuring approximately 25 cm × 20 cm; B: Contrast-enhanced chest CT revealing an eccentric, curvilinear filling defect in the thoracic aorta, accompanied by mild luminal stenosis and rigidity; C: Electronic colonoscopy showing a small protruding lesion in the rectum occupying the lumen for about 1/4 weeks, with central ulceration, and a stiff, brittle texture; D-F: First postoperative thoracic and abdominal CT review; G-I: Second postoperative thoracic and abdominal CT review. Comparative analysis across the three image sets demonstrates the progression and response to treatment.

Figure 2 Histopathological examination. A: Rectal tumor: Moderately differentiated tubular adenocarcinoma of the rectum [hematoxylin and eosin staining (HE): 100 ×]; B: Focal hypercellularity was observed within an otherwise hypocellular tumor embedded in interstitial mucinous stroma of mucinous liposarcoma (HE: 100 ×); C: Spindle-shaped tumor cells of varying sizes with multifocal nuclear atypia of Mucinous liposarcoma (HE: 400 ×).

Figure 3 Surgical images. A: Preoperative model of thoracic aortic stenting; B: Large tumor originating from the transverse colonic mesentery of gross intraoperative specimens; C: Cross-section showing a soft, greyish-white to yellowish mucinous consistency; overall dimensions: 40 cm × 20 cm × 10 cm, uniform across all sections of gross intraoperative specimens.