PCR of gene rearrangement in two cases with SMRL. A, The PCR result of case No. 4 showing IgH gene rearrangement was detected using primer pairs of FR3A and CDR3 and not FR2A; B, The PCR result of case No. 11 showing TCR gene rearrangement was detected using primer pair of TCR-γ and not TCR-CDR. (Lane 1, vitreous specimen; Lane 2, nasopharyngeal lymphoma; Lane 3, negative control; Lane 4, positive control)