There was no significant association between the GSTP1 polymorphism and tumour response (GA vs. AA OR = 1.32, 95% CI 0.97–1.80, P = 0.073, Figure 2; GG vs. AA OR = 1.29, 95% CI 0.79–2.13, P = 0.312; dominant model OR = 1.37, 95% CI 0.97–1.94, P = 0.074; recessive model OR = 1.05, 95% CI 0.70–1.57, P = 0.829; or allele model OR = 1.26, 95% CI 0.93–1.70, P = 0.134). Here, GSTP1 is linked to neoplasm.