Two discrepant cases were testicular DLBCL, both were classified as GCB (by BCL6-only phenotype) by IHC and as ABC by the Lymph2Cx assay; in accordance with the literature, 11/12 (92%) of our testicular cases were classified as ABC by the Lymph2Cx assay, the only one case classified as GCB being also CD10-positive. Here, BCL6 is linked to aneurysmal bone cyst.