Prostate Cancer Risk: Not All Men Develop It

Prostate cancer is common but not inevitable. While age is the strongest risk factor, many men never develop clinically significant disease.

Epidemiology

• Lifetime risk (US): ~1 in 8 men diagnosed; ~1 in 41 die from it.
• Autopsy studies: ~30% of men >50, ~60% >80 have histologic PCa – most indolent, never symptomatic.

Risk Factors

• Age: Rare <40; rises sharply after 50; median diagnosis age 67.
• Race: Black men: highest incidence/mortality globally; earlier onset, more aggressive.
• Family History: Father/brother → 2–3× risk; multiple relatives → higher.
• Genetics: BRCA2, HOXB13, DNA repair genes.
• Diet/Lifestyle: High dairy/calcium, low vegetable intake, obesity (aggressive disease), smoking (mortality).

Protective Factors

• High tomato/lycopene intake (cooked tomatoes).
• Cruciferous vegetables.
• Regular exercise.
• Healthy weight.
• Frequent ejaculation (some studies).
• 5-ARIs (finasteride, dutasteride) – reduce overall incidence but may increase high-grade (controversial).

Screening Implications

Because many PCa are indolent, screening (PSA ± DRE) must be individualized via shared decision-making (see Article 172014). Not all men need or benefit from screening.