The simple idea (no memorising)
Because HPV causes the disease and pre‑cancer takes years, we get two chances to intervene:
Part 1 — the HPV vaccine
Given ideally before exposure, around ages 11–12 (and from age 9, with catch‑up into the twenties). Two crucial points:
- it prevents new HPV infection but cannot treat an existing infection or established pre‑cancer;
- vaccinated people still need screening — the vaccine doesn't cover every type.
Part 2 — screening
Modern screening increasingly tests for high‑risk HPV itself (often with a smear to triage), rather than relying on smears alone. Exact ages and intervals vary by country's programme, so learn the principle — find and treat pre‑cancer — rather than a fixed schedule.
From abnormal test to diagnosis
An abnormal screen is not cancer — it triggers a closer look:
Pre‑cancer (CIN) can then be treated simply, long before it could ever become cancer.
Why it matters
This is one of medicine's great success stories: a common cancer made largely preventable. The clear divide — vaccine prevents, screening catches, biopsy confirms — is both exam‑gold and genuinely life‑saving.
Quick check ✅
- Does the HPV vaccine treat an existing infection? Do vaccinated people still need screening?
- What's the pathway from an abnormal screen to a firm diagnosis?
Remember this 🌟
Where we're going next → The last and quietest cancer hides on the ovary. First, its lumps. Concept 40.