RASSF1 and renal cell carcinoma: Independently, Hoque et al. measured GSTP1 together with CDH1, APC, MGMT, RASSF1A, p16, RARB2, and ARF methylation for RCC detection using urine and plasma samples, showing that at least one gene was hypermethylated in 88% and 67% of the patient’s urine sediments and plasma, respectively.