Recent advances in genetic predisposition to primary testicular tumors.

Review of recent advances in genetic predisposition to testicular tumors: polygenic model for germ cell tumors (GCT), first moderate-penetrance gene (CHEK2), hereditary syndrome associations for stromal tumors

This review summarizes advances in genetic predisposition to testicular tumors. For germ cell tumors (95% of cases), a polygenic model is firmly established (cumulative low-penetrance common variants from GWAS), while CHEK2 has just been identified as the first moderate-penetrance gene for this indication. For gonadal stromal tumors, associations with Mendelian syndromes are well established: Carney complex (PRKAR1A), Peutz-Jeghers (STK11), HLRCC (FH), and potentially FAP (APC) and DICER1 syndrome.

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The identification of CHEK2 as the first moderate-penetrance gene for testicular germ cell tumors is a notable advance worth integrating into cancer predisposition panels. For clinicians, this review helps identify patients with rare (stromal) testicular tumors who warrant hereditary syndrome workup — a diagnostic reflex still insufficiently established.

Clinical impact: 2/3 · Evidence strength: 2/3 · Novelty: 1/2 · Sample size: 0/1 · Journal quality: 0/1 → Total: 5/10