Cervical smear results

LSIL and HSIL: — Cervical Precancer Explained

Seeing LSIL or HSIL on a cervical smear report can feel frightening, but neither is a cancer diagnosis. Both describe cell changes in the cervix found at the precancer stage — which is precisely when they are easiest to manage.

Medically reviewed by Dr. Muralidhar Muddusetty, Surgical Oncologist, MBBS (AIIMS) · MS Surgery (AIIMS) · DNB Surg Onc · MRCS (Edinburgh) · Last reviewed September 2026

Not cancer — LSIL and HSIL are precancer findings. The cell changes are confined to the surface layer and have not grown into the tissue beneath.
LSIL often clears on its own — Mild changes caused by HPV frequently resolve without treatment as the immune system does its work.
HSIL usually needs treatment — More significant changes are less likely to resolve on their own and are usually managed with a procedure.
Found at the right stage — A smear test exists to find these changes before they can develop further. Finding them now is the system working.

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LSIL and HSIL describe cell changes found on a cervical smear report. Neither is cancer. LSIL is a mild change that often clears on its own. HSIL is a more significant change that usually needs treatment to prevent it from progressing. Both are found and managed at the precancer stage.

What do LSIL and HSIL actually mean?

LSIL — Low-Grade Squamous Intraepithelial Lesion — describes mild changes in the cells on the surface of the cervix. Most LSIL findings are linked to HPV, the human papillomavirus. In a proportion of cases the immune system clears the infection and the cells return to normal on their own, particularly in younger women.

HSIL — High-Grade Squamous Intraepithelial Lesion — describes more marked changes in the same surface cells. HSIL does not resolve reliably without treatment. Because there is a real risk of it developing into cancer over time if left unmanaged, it is usually followed by colposcopy and, in most cases, a procedure to remove the affected tissue.

What both findings share is that the changes are confined to the surface layer. They have not grown into the deeper tissue beneath. That is the biological line between precancer and cancer — and finding changes at this stage is what the smear test is designed to do.

The terms on your report, explained

LSIL: Low-Grade Squamous Intraepithelial Lesion. Mild cell changes in the surface layer of the cervix, most often linked to HPV. Frequently resolves without treatment.
HSIL: High-Grade Squamous Intraepithelial Lesion. More significant cell changes in the same surface layer. Does not resolve reliably on its own and is usually managed with a procedure.
Squamous cells: The flat cells covering the outer surface of the cervix. Most cervical precancer begins in these cells.
Intraepithelial: Inside the epithelium — the surface layer. The changes have not grown into the deeper tissue beneath, which is what makes this precancer rather than cancer.
CIN (Cervical Intraepithelial Neoplasia): An older biopsy grading system, numbered 1 to 3. CIN 1 broadly corresponds to LSIL. CIN 2 and CIN 3 broadly correspond to HSIL.
Colposcopy: A procedure to examine the cervix after an abnormal smear, using a magnifying instrument. A small biopsy is taken from any area that looks abnormal.

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LSIL compared with HSIL at a glance

Feature	LSIL	HSIL
What it means	Mild cell changes in the cervical surface layer	More marked cell changes in the same surface layer
Typical cause	HPV infection, often short-lived	HPV infection, more persistent
Does it resolve on its own?	Often, especially in younger women	Less reliably — treatment is usually recommended
Usual next step	Repeat smear or colposcopy, based on your team's assessment	Colposcopy, and in most cases a treatment procedure
Equivalent in biopsy reports	CIN 1	CIN 2 or CIN 3
Is it cancer?	No	No

Questions your family is likely asking

If it is not cancer, why does HSIL need treatment?

HSIL carries a meaningful risk of developing into cervical cancer over years without treatment. The procedure removes the affected surface tissue before that progression can happen — preventing cancer, not treating it. NCCN and ESMO guidance recommends active management of HSIL rather than a watch-and-wait approach, because the evidence that treatment prevents progression is well established.

Does this mean I definitely have HPV?

LSIL is strongly associated with HPV, and most cases are caused by it. HSIL is linked to a persistent HPV infection. Your team may have already done an HPV test alongside the smear — ask them what it showed. HPV does not mean cancer, and many infections clear on their own. The smear finds cell changes that result when an infection has persisted long enough to affect the cells.

Can LSIL turn into cancer if we just watch it?

LSIL can progress to HSIL in a small proportion of cases if the HPV infection does not clear. This is why follow-up — a repeat smear or colposcopy — is scheduled rather than a simple discharge. Attend every appointment even if you feel completely well, because these changes cause no symptoms. The risk of LSIL progressing directly to cancer without passing through HSIL is low.

Will I need to have the cervix removed?

No. Standard treatment for HSIL removes only the small area of affected surface tissue, not the cervix itself. The most common procedures in India are LEEP (Loop Electrosurgical Excision Procedure) or a cone biopsy — both remove a small amount of surface tissue and the cervix remains in place. Your surgeon will explain which procedure they are recommending based on the colposcopy findings.

Can I still have children after treatment for HSIL?

For most women, LEEP and similar procedures do not significantly affect the ability to conceive. There is a small increase in the risk of preterm birth, particularly if a larger amount of tissue is removed. If you are planning a pregnancy, tell your team before any procedure is planned — this affects the choice of approach. Most women treated for HSIL go on to have normal pregnancies.

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Common questions

Frequently asked questions

What is the difference between a smear result and a biopsy result?

A smear test looks at the appearance of cells collected from the cervix's surface — that is where LSIL and HSIL come from. A biopsy takes a small piece of tissue for a more detailed picture. LSIL and HSIL on a smear are often followed by colposcopy and biopsy. The biopsy result may use CIN grading — CIN 1, 2, or 3 — which describes the same spectrum of changes using an older naming system.

How long does LSIL take to clear on its own?

There is no reliable way to predict whether a specific LSIL result will clear or persist. LSIL linked to HPV can resolve within one to two years in many cases, but this varies. Your team will schedule a repeat smear after a defined interval to confirm whether the result is moving toward normal or needs closer attention. Attend every follow-up appointment even if you feel completely well.

What happens during a colposcopy?

Colposcopy is done in an outpatient clinic, similar to a smear. A dilute solution applied to the cervix makes abnormal cells visible under a magnifying instrument placed outside the body. If an area looks abnormal, a small biopsy is taken — this may cause a brief cramp. Most women return to normal activities the same day. Biopsy results usually take one to two weeks.

Can HSIL come back after treatment?

Yes, in a proportion of cases. This is why follow-up smears are scheduled at regular intervals after treatment. Recurrence does not mean treatment failed — it means the HPV infection has persisted and new changes have developed. Most recurrences are caught at the same early stage and managed with the same range of procedures. Keeping every follow-up appointment is the most important thing after treatment.

Is CION able to manage LSIL or HSIL?

Yes. CION's gynaecology oncology teams see cervical precancer findings and can arrange colposcopy, biopsy, and the procedures used to treat HSIL. If your smear was done elsewhere and you want to continue follow-up at a CION centre, bring your original report and any biopsy results. Your treating team will advise on next steps from there.

Can I be tested for HPV at the same time as a smear?

Yes. Co-testing — a smear and an HPV test from the same sample — is increasingly the recommended approach and is available in many settings in India. The HPV result alongside the smear finding helps your team decide how urgently follow-up is needed. Ask your gynaecologist whether co-testing was included at your last smear, or whether it can be added at your next one.

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