Cervical Cancer Screening: Pap Smears, HPV Tests, and What the Guidelines Say

Cervical cancer was once one of the leading causes of cancer death among women in the United States. Today, thanks to widespread screening and the HPV vaccine, cervical cancer deaths have dropped dramatically — by more than 50% over the past four decades.

That progress is not accidental. It is the direct result of regular screening catching precancerous changes before they become cancer. Understanding the current guidelines — and staying on schedule — is one of the most powerful things you can do for your health.

Nearly all cervical cancers — about 99% — are caused by persistent infection with human papillomavirus (HPV), a very common sexually transmitted infection. Most HPV infections clear on their own within 1–2 years without causing any problems. But in some women, certain high-risk strains of HPV (particularly HPV 16 and HPV 18) can cause changes to cervical cells that, if left untreated, may develop into cancer over 10–20 years.

This slow progression is exactly what makes cervical cancer so preventable. Screening can detect abnormal cells long before cancer develops.

A Pap smear collects cells from the cervix and examines them under a microscope for abnormal changes. It has been the cornerstone of cervical cancer screening for decades.

An HPV test checks for the presence of high-risk HPV strains in cervical cells. It can be done at the same time as a Pap smear (called co-testing) or on its own (called primary HPV testing).

HPV testing is more sensitive than a Pap smear alone — it catches more precancerous changes. This is why current guidelines increasingly favor HPV-based testing.

• Ages 21–29: Pap smear alone every 3 years
• Ages 30–65: One of three options:
  • Pap smear alone every 3 years
  • HPV test alone every 5 years
  • Co-test (Pap + HPV) every 5 years
• Under age 21: Screening not recommended, regardless of sexual activity
• Over age 65: Screening can stop if you have had adequate prior screening with normal results and are not at high risk

• Ages 25–65: HPV test alone every 5 years (preferred)
• Co-testing every 5 years or Pap smear every 3 years are acceptable alternatives
• Under age 25: Screening not recommended
• Over age 65: Stop screening if you have had 3 consecutive normal Pap smears or 2 consecutive normal co-tests within the past 10 years, with the most recent test in the past 5 years

The USPSTF starts at 21; the ACS starts at 25. Both agree that screening before age 21 is not recommended. The difference reflects evolving evidence — HPV infections in young women almost always clear on their own, and early screening can lead to unnecessary procedures. Talk with your doctor about the right starting age for you.

You may be able to stop cervical cancer screening if:

• You are over age 65 and have had adequate normal screening results in recent years
• You have had a total hysterectomy (removal of the uterus and cervix) for a non-cancerous reason and have no history of high-grade cervical cell changes

Women who have had a hysterectomy but still have their cervix (partial hysterectomy) should continue screening.

Women with a history of cervical cancer, high-grade precancerous lesions (CIN 2 or CIN 3), or HIV infection should continue screening beyond age 65 — discuss with your doctor.

No abnormal cells were found. Continue with routine screening on schedule.

The sample did not contain enough cells to evaluate. A repeat test is needed — this is not a cause for alarm.

Mildly abnormal cells were found. This is the most common abnormal result and often resolves on its own. Your doctor may recommend an HPV test, a repeat Pap in 1 year, or a colposcopy depending on your age and HPV status.

Mild cell changes, often associated with HPV infection. Many resolve without treatment. Follow-up testing or colposcopy may be recommended.

More significant cell changes that have a higher chance of progressing to cancer if untreated. A colposcopy and possible biopsy are typically recommended.

Abnormal glandular cells, which line the cervical canal. Further evaluation is needed, as these can sometimes indicate more serious conditions.

A colposcopy is a closer examination of the cervix using a magnifying instrument. If abnormal areas are seen, a small tissue sample (biopsy) may be taken for further analysis. It is an outpatient procedure done in the office.

The HPV vaccine is one of the most effective cancer-prevention tools available. It protects against the HPV strains responsible for most cervical cancers.

Current recommendations:

• Ages 11–12: Routine vaccination (can start as early as age 9)
• Ages 13–26: Catch-up vaccination if not previously vaccinated
• Ages 27–45: Discuss with your doctor — vaccination may still be beneficial for some adults

The vaccine does not replace screening. Even vaccinated women should continue Pap smears and HPV testing on schedule, because the vaccine does not protect against all HPV strains.

During a pelvic exam, your provider will:

1. Ask you to lie on the exam table with your feet in stirrups
2. Gently insert a speculum to visualize the cervix
3. Use a small brush or spatula to collect cells from the cervix — this takes only a few seconds
4. Send the sample to a lab for analysis

The procedure is brief. Some women feel mild pressure or cramping. Results are typically available within 1–2 weeks.

Tips for a more comfortable exam:

• Schedule your appointment when you are not menstruating
• Empty your bladder beforehand
• Try to relax your pelvic muscles — taking slow, deep breaths can help
• Let your provider know if you have had discomfort with exams in the past

Common reasons women delay cervical cancer screening include:

• "I feel fine." Precancerous changes cause no symptoms. That is why screening exists.
• "I'm not sexually active." Women who are no longer sexually active still need screening on schedule until age 65.
• "I had a hysterectomy." If your cervix was not removed, you still need Pap smears.
• "I'm embarrassed or uncomfortable." Your provider performs these exams routinely and is focused entirely on your health. Speak up if you have concerns — we can work together to make the experience as comfortable as possible.

Cervical cancer caught at an early, localized stage has a 5-year survival rate of over 91%. Caught after it has spread to distant organs, that rate drops to about 19%. Screening is the difference.

If you are unsure when your last Pap smear or HPV test was, or if you have questions about which test is right for you, we are here to help.

At Manatee Primary Care, cervical cancer screening is part of our comprehensive preventive care for women. Call us at (941) 867-9362 or request an appointment online — your health is worth the time.

This post is for educational purposes and does not replace personalized medical advice. Guidelines are based on USPSTF (2021), American Cancer Society (2020), and ASCCP recommendations.