The third pathological investigation revealed non-germinal center B cell like (GCB) diffuse large B cell lymphoma (DLBCL) with invasion of striated muscle tissue, positive for Bcl-2 (90%+), Bcl-6 (60%+), CD20 (3+), Ki67 (80%+), MUM1 (80%+) and c-myc (50%+). This evidence concerns the gene BCL6 and diffuse large B-cell lymphoma.