Microsatellite instability analysis in NHL. (A) Representative results of MSI analysis in matched normal (N) and tumor (T) DNAs from the same individuals for five MSI loci (listed at the left of each panel). (B) Representative results of MSI analysis in matched DNA samples derived from tumors at diagnosis (T1) and after tumor progression (T2) for the same five MSI loci (listed at the left of each panel). Arrows point to samples where MSI is detectable.