Synchronous rectal adenocarcinoma and intestinal mantle cell lymphoma: A case report

Figure 1 Endoscopy and imaging examinations. A: Colonoscopy image revealed an ulcerated mass in the middle rectum (asterisk); B: The middle rectal tumor (arrow); C: A 4 cm × 6 cm abnormal mass in the right iliac fossa (arrow).

Figure 2 The gross appearance of the lesion. A: Intraoperative image shows an enormous ileal polyp measuring 4 cm × 6 cm (asterisk); B: The resected specimen included an 18 cm colorectal segment and an ileal segment; C: The resected ileal segment; D: The ileostomy contained multiple polyps.

Figure 3 The microscopic appearance of the lesion. A: A loupe view of a rectal cross section shows both adenocarcinoma tumors (white arrow) and lymphoma tumors (black arrow) [hematoxylin and eosin (H&E) staining, 4×]; B: An infiltrating moderately differentiated adenocarcinoma of the rectum (H&E staining, 10×); C: Mucosal and submucosal nodules of lymphoma on polyps (H&E staining, 20×); D: H&E staining of lymphoma (magnification 40×).

Figure 4 Immunohistochemical analysis of lymphoid cells (magnification 10×). A: CD5 (+); B: CD20 (+); C: Cyclin D1 (+); D: SOX-11 (+).