ERG and cancer: For example, high GGH staining was seen in 47.2% and 44.6% of cancers with TMPRSS2: ERG fusion detected by IHC and FISH, but was found in only 32.4% of cancers without ERG staining, and in 30.6% of cancers without ERG rearrangements (p < 0.0001 each; Figure 2).