Cervical cancer is the fourth most common cancer affecting women worldwide, with over 600,000 new cases diagnosed annually and approximately 350,000 deaths each year1 . The risk of cervical cancer remains significant beyond young adulthood, with incidence peaking in women over 30 years old and the median age at diagnosis being 50 years1 . Despite advances in prevention and screening, cervical cancer screening rates have declined in recent years and have not fully rebounded after the COVID-19 pandemic, underscoring the need for continued public health efforts2 . Human papillomavirus (HPV) infection is the primary cause of cervical cancer, making vaccination and regular screening essential tools in reducing disease burden1 3.
💡 Did You Know? 💡 Nearly all sexually active people will contract HPV at some point, but most infections clear on their own without causing cancer1 4.
Key Facts About Cervical Cancer Prevention
Cervical cancer develops when abnormal cells in the cervix grow uncontrollably, often triggered by persistent infection with high-risk types of HPV. Nearly all sexually active individuals will contract HPV at some point, but most infections clear spontaneously without causing harm1 45. Persistent HPV infection can lead to precancerous changes and eventually cervical cancer if not detected and treated early1 5.
Several factors increase the risk of developing cervical cancer, including both modifiable and non-modifiable risks:
- Human Papillomavirus (HPV) Infection: The most important risk factor, with high-risk HPV types causing over 90% of cervical cancers1 46.
- Early Sexual Activity and Multiple Sexual Partners: Starting sexual activity at a young age and having multiple partners increase exposure to HPV1 6.
- Smoking: Tobacco use doubles the risk of cervical cancer by impairing the immune system’s ability to clear HPV infections and introducing carcinogens to cervical tissue4 6.
- Other Sexually Transmitted Infections (STIs): Infections such as chlamydia, herpes, gonorrhea, syphilis, and HIV increase susceptibility to HPV persistence and cervical cancer4 6.
- Weakened Immune System: Conditions like HIV infection or immunosuppressive therapy reduce the body's ability to fight HPV1 46.
- Long-term Use of Oral Contraceptives: Extended use of birth control pills may slightly increase risk, but risk declines after stopping6 .
- Multiple Full-term Pregnancies and Young Age at First Pregnancy: Having three or more full-term pregnancies or giving birth before age 20 raises risk, possibly due to hormonal and immune changes6 .
- In Utero Exposure to Diethylstilbestrol (DES): Women whose mothers took DES during pregnancy have a higher risk of a rare cervical cancer subtype1 46.
- Low Socioeconomic Status: Limited access to healthcare reduces screening and treatment opportunities, increasing risk6 .
Preventing cervical cancer involves reducing exposure to HPV and detecting precancerous changes early through screening:
“We are going to move from diagnosis
— ‘You have this disease’ — to prediction — ‘You are going to get this disease, and here is how we can stop it from ever occurring.’ These efforts will be aided by the type of medical scanning we first saw on Star Trek — science fiction then, but closer to reality with each passing day.” — In an open letter to population health vendors, Adventist Health9
- HPV Vaccination: Recommended for girls and boys starting as early as age 9, with routine vaccination at ages 11–12. Vaccination can prevent about 90% of HPV-related cancers but does not replace the need for screening1 436.
- Regular Cervical Cancer Screening: Pap tests and HPV tests detect abnormal cervical cells before they become cancerous. Screening is recommended for all women aged 21 to 65, regardless of sexual history1 357.
- Safe Sexual Practices: Using condoms and limiting the number of sexual partners reduce HPV transmission risk3 6.
- Smoking Cessation: Quitting smoking lowers the risk of persistent HPV infection and cervical cancer4 36.
- Healthy Lifestyle: Regular exercise and maintaining a healthy weight may reduce cancer risk8 .
Screening programs have significantly reduced cervical cancer incidence and mortality by detecting precancerous lesions early1 57. Current recommendations emphasize age-specific screening intervals and methods:
| Age Group | Screening Method | Frequency |
|---|---|---|
| 21–29 years | Pap test alone | Every 3 years |
| 30–65 years | Pap test + HPV test (co-testing) OR | Every 5 years (co-testing) |
| HPV test alone OR Pap test alone | Pap test every 3 years | |
| Over 65 years | Stop screening if adequate prior screening and no high risk | No routine screening |
| Post-hysterectomy | No screening if cervix removed and no history of high-grade lesions | No routine screening |
| > “HPV causes more than nine out of 10 cervical cancers, and vaccination can prevent over 90% of HPV-related cancers.” | ||
| > — Dr. Nariman Heshmati3 |
Screening should begin at age 21 regardless of sexual activity, as cervical cancer is rare before this age and early screening can lead to unnecessary treatment5 7. Women with a history of cervical precancer, immunosuppression, or DES exposure may require more frequent screening and individualized follow-up7 6.
- Pap Test (Pap Smear): Cells are collected from the cervix and examined for abnormalities4 5.
- HPV Test: Detects high-risk HPV types in cervical cells5 7.
- Colposcopy: If screening results are abnormal, a colposcopy allows detailed examination of the cervix and biopsy of suspicious areas4 .
- Treatment of Precancerous Lesions: Procedures like LEEP (loop electrosurgical excision) remove abnormal tissue to prevent progression to cancer4 5.
Despite proven benefits, cervical cancer screening rates have declined over the past two decades and have not returned to pre-pandemic levels, especially among certain racial and ethnic groups2 . Barriers include access to care, cultural factors, and misinformation. Increasing HPV vaccination coverage and improving screening participation are critical to reducing cervical cancer incidence further2 .
