ALK and neoplasm: In concordance with the original tumor and the LM1 cell line, the LM1 xenograft revealed the presence of plasmoblastic DLBCL with expression of fine granular cytoplasmic ALK-staining, expression of the immunoglobulin kappa light chain, CD138 and negativity for CD30 (Figure 1), indicating that the cellular features were maintained in the xenografted tumor.