Table 4. Sensitivity of IHC test for samples classified as positive by the H&E test that were stored during 1990-2000 or 2001-2011.

	Group 1 (1990-2000) H&E +	Group 2 (2001-2011) H&E +
IHC +	24 (83%)	26 (84%)
IHC -	5 (17%)	5 (16%)
Sample size (%)	29 (100%)	31 (100%)