For example, GSTP1 overexpression is a marker of cell proliferation in a variety of tumors, such as transitional cell carcinoma of the bladder [22, 23], renal epithelial renal cell carcinoma [24, 25], ovarian cancer [26, 27], breast cancer [28, 29], and colorectal cancer [30, 31]. The gene discussed is GSTP1; the disease is ovarian carcinoma.