A Pap smear (Pap test) is a screening test for cervical cancer that collects cells from the cervix to look for abnormal or precancerous changes. Procedure: performed during pelvic exam; speculum inserted into vagina; cells gently scraped or brushed from cervix; placed in liquid medium (modern liquid-based cytology); sent to laboratory for evaluation; takes 5-10 minutes total. Often combined with HPV (human papillomavirus) testing — most cervical cancers caused by HPV; HPV co-testing better identifies women at higher risk. Results: normal (no abnormal cells), ASC-US (atypical squamous cells of undetermined significance — minor changes), LSIL (low-grade squamous intraepithelial lesion), HSIL (high-grade — precancerous), AGC (atypical glandular cells), cancer. Most abnormal results don’t indicate cancer — follow-up testing (colposcopy with biopsy if needed) clarifies. USPSTF/ACOG guidelines: age 21-29 — Pap test alone every 3 years (HPV testing alone every 5 years is newer option, or co-testing every 5 years); age 30-65 — preferred Pap + HPV co-test every 5 years (alternative Pap alone every 3 years or HPV alone every 5 years); age 65+ — stop screening if adequate prior negative screening and not high risk; after hysterectomy with cervix removal for non-cancer reasons — stop screening; high-risk women (HIV, immunocompromised, prior abnormal results, in utero DES exposure) — more frequent. Diabetes alone doesn’t change recommended intervals. However, poorly controlled diabetes may impair immune function and HPV clearance — well-controlled diabetes important. Importance: cervical cancer largely preventable through screening. Some studies suggest about 20-30% increased cervical cancer risk in women with type 2 diabetes. Possible mechanisms: immune dysfunction (diabetes may impair clearance of HPV infections — HPV is causative virus for most cervical cancers); chronic inflammation; shared risk factors; possible direct effects of hyperglycemia/hyperinsulinemia on cervical tissue. However: cervical cancer risk much more determined by HPV exposure, smoking, immune status than by diabetes specifically. Risk reduction: HPV vaccination (Gardasil 9 — recommended for adults up to age 26 routinely, 27-45 individualized), regular Pap screening, don’t smoke, limit number of sexual partners, condom use. Pap smear procedure: schedule when not menstruating (light bleeding okay); avoid intercourse, douching, vaginal medications, tampons for 24-48 hours before; undress from waist down; cover with sheet; lie on exam table with feet in stirrups; speculum inserted into vagina (briefly uncomfortable); cervix visualized; cells collected with small brush or spatula; speculum removed; bimanual exam may follow. Sensations: pressure during speculum; brief pinch or scrape during sample collection; minimal pain for most. Tips: deep breathing helps relax pelvic muscles; let provider know if very uncomfortable; smaller speculum often available. Results: usually 1-3 weeks.
Screening Schedule by Age
| Age | Preferred | Alternative |
|---|---|---|
| Under 21 | No screening | — |
| 21-29 | Pap every 3 years | HPV every 5 years (newer) |
| 30-65 | Pap + HPV co-test every 5 years | Pap every 3 years or HPV every 5 years |
| 65+ (with adequate prior screening) | Stop | — |
| After total hysterectomy (non-cancer) | Stop | — |
| High-risk (HIV, etc.) | More frequent | Per provider |
Pap Smear Result Categories
| Result | Meaning | Action |
|---|---|---|
| Normal/negative | No abnormal cells | Routine screening |
| ASC-US | Atypical squamous cells, undetermined significance | HPV test; repeat Pap; colposcopy if needed |
| LSIL | Low-grade squamous intraepithelial lesion | Colposcopy with biopsy usually |
| HSIL | High-grade lesion — precancerous | Colposcopy with biopsy; possible LEEP/treatment |
| AGC | Atypical glandular cells | Colposcopy + endometrial sampling |
| Cancer | Cervical cancer cells | Gynecologic oncology referral |
HPV and Cervical Cancer
- HPV is causative virus for ~99% of cervical cancers.
- Over 100 HPV types; ~14 high-risk types cause cervical cancer.
- HPV-16 and HPV-18 cause about 70% of cervical cancers.
- Most HPV infections cleared by immune system within 1-2 years.
- Persistent infection with high-risk HPV → cervical changes → cancer (years to decades).
- Gardasil 9 vaccine prevents 9 HPV types covering ~90% of cervical cancers.
- HPV vaccination ideal at ages 11-12; routine up to 26; individualized 27-45.
- HPV co-testing better identifies high-risk women.
- Negative HPV test reassuring even with abnormal cells.
Risk Reduction Beyond Screening
- HPV vaccination — most important prevention.
- Don’t smoke (smoking is independent cervical cancer risk factor).
- Limit number of sexual partners.
- Condom use (partial protection against HPV).
- Limit alcohol.
- Manage diabetes well (immune function).
- Healthy diet rich in folate, antioxidants.
- Maintain healthy weight.
- Regular Pap screening at recommended intervals.
The Bottom Line
A Pap smear (Pap test) is a screening test for cervical cancer that collects cells from the cervix to look for abnormal or precancerous changes. Procedure: performed during pelvic exam; speculum inserted into vagina; cells gently scraped or brushed from cervix; placed in liquid medium (modern liquid-based cytology); sent to laboratory for evaluation; takes 5-10 minutes total. Often combined with HPV (human papillomavirus) testing — most cervical cancers caused by HPV; HPV co-testing better identifies women at higher risk. Results: normal (no abnormal cells), ASC-US (atypical squamous cells of undetermined significance — minor changes), LSIL (low-grade squamous intraepithelial lesion), HSIL (high-grade — precancerous), AGC (atypical glandular cells), cancer. Most abnormal results don’t indicate cancer — follow-up testing (colposcopy with biopsy if needed) clarifies. USPSTF/ACOG guidelines: age 21-29 — Pap test alone every 3 years; age 30-65 — preferred Pap + HPV co-test every 5 years (alternative Pap alone every 3 years or HPV alone every 5 years); age 65+ — stop screening if adequate prior negative screening and not high risk; after hysterectomy with cervix removal for non-cancer reasons — stop screening; high-risk women (HIV, immunocompromised, prior abnormal results, in utero DES exposure) — more frequent. Diabetes alone doesn’t change recommended intervals. However, poorly controlled diabetes may impair immune function and HPV clearance — well-controlled diabetes important. Some studies suggest about 20-30% increased cervical cancer risk in women with type 2 diabetes. Possible mechanisms: immune dysfunction (diabetes may impair clearance of HPV infections), chronic inflammation, shared risk factors, possible direct effects of hyperglycemia/hyperinsulinemia on cervical tissue. However: cervical cancer risk much more determined by HPV exposure, smoking, immune status than by diabetes specifically. Risk reduction: HPV vaccination (Gardasil 9 — recommended for adults up to age 26 routinely, 27-45 individualized), regular Pap screening, don’t smoke (smoking is independent cervical cancer risk factor), limit number of sexual partners, condom use (partial protection against HPV), limit alcohol, manage diabetes well (immune function), healthy diet rich in folate and antioxidants, maintain healthy weight. Pap smear procedure: schedule when not menstruating; avoid intercourse, douching, vaginal medications, tampons for 24-48 hours before; undress from waist down; lie on exam table with feet in stirrups; speculum inserted into vagina; cervix visualized; cells collected with small brush or spatula; speculum removed; bimanual exam may follow. Sensations: pressure during speculum; brief pinch or scrape during sample collection; minimal pain for most. Tips: deep breathing helps relax pelvic muscles; let provider know if very uncomfortable; smaller speculum often available. Results: usually 1-3 weeks. For adults with diabetes — adhere to screening intervals, get HPV vaccination if eligible, manage diabetes well to support immune function. See our broader prediabetes detection guide.
