APC and benign prostatic hyperplasia: GSTP1 and APC mRNA was highly expressed in the majority of BPH tissues (the positive rates were 90.0% and 80.0%, respectively), while a low level of expression was observed in the majority of PCa tissues (the positive rate in poorly-differentiated tissues was 23.3% and 33.3%, respectively; P<0.05; Fig. 2 and Table II).