Objective:
To estimate association between androgen receptor (AR) gene polymorphisms and testicular germ cell tumor (TGCT) susceptibility.
Materials and Methods:
Systematic search of studies on the association between AR gene polymorphisms and TGCT susceptibility was conducted. Odds ratios and 95% confidence intervals were used to pool effect size.
Results:
For CAG repeat, no evidence was found for association between (>25 vs. ≤25), (>25 vs. 21–25), (<21 vs. 21–25), (others vs. 21–25), (>23 vs. ≤23), (<21 vs. ≥21), (<21 vs. ≥21)'s some subgroups and TGCT susceptibility, which showed stability. In (>24 vs. ≤24), (>24 vs. 21–24), (<21 vs. 21–24), and (others vs. 21–24) and almost all of their subgroups, increased TGCT risk was found without sensitivity analysis. For GGN, no statistical change of TGCT risk was found in (<23 vs. ≥23), (<23 vs. 23), which showed stability. For single nucleotide polymorphism (SNP) rs6152 G > A, rs1204038 G > A and rs2361634 A > G, no statistical change was found without sensitivity analysis.
Conclusions:
GGN repeat number <23 may not be associated with TGCTs susceptibility. However, there was insufficient data to fully confirm association in GGN repeat number >23, CAG repeat number, SNP rs6152, rs1204038, and rs2361634.
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