Gastrointestinal manifestations, risk factors, and management in patients with post-transplant lymphoproliferative disorder: A systematic review

Figure 3 Post-transplant lymphoproliferative disorder, monomorphic type (extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue) arising in a sigmoid colon polyp. A: 4 ×/6 mm; B: 60 ×/400 μm; C: 100 ×/240 μm; D: 100 ×/240 μm. Hematoxylin & eosin stain showed a dense lymphoid infiltrate in the lamina propria composed of monotonous small-sized lymphoid cells with mature chromatin and abundant clear cytoplasm. Ki-67 showed low proliferation index.