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Home Knowledge Center Wellness Library Cervical Cell Changes on a Pap Test

Cervical Cell Changes on a Pap Test

Overview

Cervical cell changes are classified according to their degree of abnormality using the Bethesda system (TBS). Further evaluation decisions are guided by the kinds of changes seen in the cells.

Minor cell changes

Minor cell changes may go away without treatment. But sometimes they turn into more serious cell changes. Types of minor cell changes include:

  • Atypical squamous cells (ASC). These are changes for which the cause is unknown. They may be caused by an HPV infection. Or they may be caused by inflammation, another infection, or atrophic vaginitis. ASC is further classified as:
    • ASC of undetermined significance (ASC-US). These changes usually stay the same or return to normal.
    • ASC that cannot exclude high-grade squamous intraepithelial lesions (HSIL) (ASC-H). These changes are also minor. But they are more likely to become more serious.
  • A low-grade squamous intraepithelial lesion (LSIL). This is also called mild dysplasia. This change is usually caused by HPV and may be more likely to become more severe over time. But even when it does, it usually returns to normal.

Moderate to severe cell changes

Moderate to severe cervical cell changes (also called moderate to severe dysplasia) mean cell changes that are more likely to be precancerous and develop into cervical cancer if left untreated. Moderate to severe cervical cell changes are classified in the Bethesda system (TBS) as high-grade squamous intraepithelial lesions (HSIL) or atypical glandular cells (AGC). Follow-up evaluation is needed, and treatment may be needed.

All abnormal Pap tests require follow-up to identify development of more severe cell changes, including cervical cancer. Most abnormal cells can be removed or destroyed before they become cancerous.

This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.

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Related Links

Carbon Dioxide Laser Surgery for Abnormal Cervical Cell Changes Cone Biopsy (Conization) for Abnormal Cervical Cell Changes Loop Electrosurgical Excision Procedure (LEEP) for Abnormal Cervical Cell Changes Abnormal Pap Test

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