Frequency of somatic mutations in the BCL6 sequence in Ig/BCL6 and non-Ig/BCL6 rearranged alleles in gastric lymphoma. Diagrammatic illustration showing frequency of BCL6 somatic mutations detected in Ig/BCL6 (A) and non-Ig/BCL6 (B) rearranged alleles and their corresponding non-rearranged allele in each case. Straight horizontal lines represent non-rearranged alleles while rectangle boxes represent the fusion partner genes. Small vertical bars represent the mutations detected. *DLCLML cases.