Transformed gastric mucosa-associated lymphoid tissue lymphoma originating in the colon and developing metachronously after Helicobacter pylori eradication: A case report

Figure 4 Molecular biological analysis. A: Three copies of the MALT1 gene were detected in the nuclei of lymphoma cells (Fluorescence in situ hybridization); B: The bands indicating monoclonality (orange arrows) matched, revealing that the colonic and gastric lesions had the same clonality (polymerase chain reaction-based single-strand conformational polymorphism).