Cervical dysplasia is a condition where abnormal cells grow on the surface of the cervix. It is closely linked to the human papillomavirus (HPV), which is one of the most common sexually transmitted infections in Canada. While it is not cancer, cervical dysplasia can develop into cervical cancer if it goes undetected. The good news is that regular screening can catch it early — and early detection saves lives.
What Is Cervical Dysplasia?
Cervical dysplasia means the cells lining the cervix have changed in an abnormal way. Doctors also call this condition cervical intraepithelial neoplasia (CIN). It is not the same as cervical cancer, but it is considered a precancerous condition.
These abnormal cells develop in the thin layer of tissue that covers the cervix. In many cases, mild dysplasia goes away on its own. However, moderate to severe cases need medical attention to prevent the condition from progressing.
What Causes Cervical Dysplasia?
HPV is the main cause of cervical dysplasia. HPV stands for human papillomavirus, a virus that spreads through sexual contact. There are many types of HPV. Some types cause genital warts, while others are linked to cancer.
High-risk HPV types — especially HPV 16 and HPV 18 — are responsible for about 70% of cervical cancer cases. These two strains are the most dangerous. In addition, other high-risk HPV types can also lead to cancers of the anus, vulva, vagina, penis, and throat.
HPV is very common. In fact, between 75% and 80% of sexually active people will get some form of HPV during their lifetime. For most people, the immune system clears the virus within a few months. However, when the body cannot clear the virus, it can cause lasting cell changes that may lead to cancer over time.
How Does HPV Spread?
HPV spreads mainly through sexual contact, including vaginal, anal, and oral sex. It can also spread through skin-to-skin genital contact, even without penetration. Using a condom lowers your risk, but it does not fully protect you from HPV. This is because the virus can live on skin that a condom does not cover.
Therefore, vaccination and regular screening remain the most effective ways to protect yourself. You can learn more about HPV transmission from the World Health Organization’s HPV fact sheet.
Symptoms of Cervical Dysplasia and Cervical Cancer
One of the biggest challenges with cervical dysplasia is that it usually causes no symptoms at all. Most women feel completely normal, even when abnormal cells are present. This is why regular Pap tests are so important.
In more advanced stages, cervical cancer can cause the following symptoms:
Irregular vaginal bleeding between periods
Bleeding after sexual intercourse
Unusual or heavy vaginal discharge
Pelvic pain unrelated to your period
If you notice any of these symptoms, do not wait. See your family doctor or visit a walk-in clinic as soon as possible. These symptoms can have other causes, but it is always best to rule out anything serious.
How Is Cervical Dysplasia Diagnosed?
There are several tools doctors use to diagnose cervical dysplasia and cervical cancer. Early diagnosis gives you the best chance of successful treatment.
The Pap Test (Pap Smear)
The Pap test is the most important screening tool for cervical dysplasia. During a Pap test, your doctor collects a small sample of cells from the cervix. These cells are then examined under a microscope for any abnormalities.
Pap test results are grouped into five classes:
Class I: Normal cells — no action needed
Class II: Benign changes such as minor inflammation — usually monitored
Class III: Unclear or suspicious cells — further testing required
Class IV: Cells that are likely cancerous — treatment needed promptly
Class V: Clearly cancerous cells present — immediate treatment required
Classes I and II are considered normal. Classes III through V require follow-up testing. Your doctor will explain what your results mean and what to do next. Most provincial health plans in Canada cover the cost of routine Pap tests for eligible patients.
Colposcopy
If your Pap test results are abnormal, your doctor may recommend a colposcopy. A colposcopy uses a special magnifying instrument called a colposcope to examine the cervix, vagina, and vulva up close.
This procedure allows the doctor to identify abnormal areas more precisely. At the same time, the doctor may take small tissue samples for further analysis. A colposcopy is typically performed in a clinic and does not require general anaesthesia.
Biopsy
If the colposcopy reveals abnormal tissue, the doctor will perform a biopsy. This means taking a tiny sample of tissue — roughly 2mm by 2mm — from the most affected area of the cervix.
The tissue is then sent to a lab for detailed analysis. The biopsy confirms whether the abnormal cells are precancerous or cancerous. Most patients find the procedure only mildly uncomfortable.
HPV Test
An HPV test can identify the specific type of HPV present in the body. This is done using a molecular biology method that detects high-risk and low-risk HPV strains. Knowing which type of HPV is present helps your doctor assess your risk level and choose the most effective treatment plan.
In Canada, HPV testing is sometimes done alongside a Pap test, depending on your province’s screening guidelines. Ask your family doctor whether an HPV test is right for you. For more information on cervical cancer screening, visit Health Canada’s official health information page.
Treatment Options for Cervical Dysplasia
Treatment for cervical dysplasia depends on how severe the cell changes are. Mild dysplasia often does not need immediate treatment. Instead, your doctor may recommend watchful waiting with more frequent Pap tests to monitor any changes.
However, moderate to severe cervical dysplasia usually requires a procedure to remove the abnormal cells. The most common surgical option is called a LEEP procedure.
LEEP Procedure
LEEP stands for Loop Electrosurgical Excision Procedure. It is also known as LLETZ (Large Loop Excision of the Transformation Zone). During this procedure, a thin wire loop with an electrical current is used to cut away the abnormal tissue from the cervix.
The procedure is usually done under local anaesthesia in an outpatient setting. It is quick and effective. Most women return to normal activities within a few days. As a result, LEEP is now one of the most widely used treatments for moderate and severe cervical dysplasia.
Other Surgical Approaches
In some cases, a procedure called a conization (cone biopsy) is used. This involves removing a cone-shaped section of cervical tissue. It may be done under general anaesthesia. Your specialist will discuss which option is best for your individual situation.
HPV Vaccination and Prevention
Vaccination is the most powerful tool we have for preventing cervical dysplasia and cervical cancer. The HPV vaccine protects against the high-risk strains most likely to cause cancer, including HPV 16 and HPV 18.
In Canada, the HPV vaccine is part of publicly funded school immunisation programmes in all provinces and territories. It is most effective when given before a person becomes sexually active. However, older teens and adults can also benefit from the vaccine.
It is important to understand that the HPV vaccine is preventive, not curative. It does not treat an existing HPV infection or cervical dysplasia. Furthermore, the vaccine does not protect against all HPV strains. This is why regular Pap tests remain essential, even if you have been vaccinated.
You can read more about the HPV vaccine from the Mayo Clinic’s HPV vaccine guide.
Cervical Cancer in Canada: Why Screening Matters
Cervical cancer develops slowly, usually over many years. It begins with abnormal cell changes — like cervical dysplasia — that gradually become more serious. By the time symptoms appear, the cancer may have already spread to nearby tissue, the lymph nodes, or the pelvis.
Early-stage cervical cancer has no symptoms. This makes regular screening the only reliable way to catch it in time. In fact, cervical cancer is one of the most preventable cancers when detected early through Pap testing and HPV vaccination.
Most provincial and territorial health plans in Canada cover routine cervical cancer screening for women and people with a cervix. Guidelines vary slightly by province regarding how often you should be screened. Your family doctor can tell you what schedule is right for you based on your age and health history.
When to See a Doctor
You should speak to your family doctor or visit a walk-in clinic if you have not had a Pap test within the recommended timeframe for your province. Most guidelines suggest starting screening at age 21 or within a few years of becoming sexually active.
Also see a doctor promptly if you experience any of the following:
Unusual vaginal bleeding or spotting
Bleeding during or after sex
Persistent pelvic discomfort
Abnormal vaginal discharge
A Pap test result that needs follow-up
Do not ignore abnormal Pap test results. Your doctor will guide you through any necessary next steps. If you do not have a family doctor, a walk-in clinic can provide a referral or initial assessment.
Please note: The information in this article is for general educational purposes only. Always consult your family doctor or a qualified healthcare provider for advice specific to your health situation.
Frequently Asked Questions About Cervical Dysplasia
What is the difference between cervical dysplasia and cervical cancer?
Cervical dysplasia means abnormal cells are present on the cervix, but these cells are not yet cancerous. If left untreated, moderate to severe cervical dysplasia can progress into cervical cancer over time. Regular Pap tests help catch dysplasia early, before it has a chance to become cancer.
Can cervical dysplasia go away on its own?
Mild cervical dysplasia often clears up on its own as the immune system fights off the underlying HPV infection. However, moderate to severe cases are less likely to resolve without treatment. Your doctor will monitor your condition with follow-up Pap tests and recommend treatment if needed.
How often should I get a Pap test in Canada?
Screening guidelines vary by province, but most recommend a Pap test every two to three years for people with a cervix between the ages of 21 and 65. Your family doctor can advise you on the right schedule based on your age, health history, and previous results. Many provincial health plans cover routine Pap testing at no cost.
Is the HPV vaccine effective against cervical dysplasia?
Yes, the HPV vaccine significantly reduces the risk of developing cervical dysplasia by protecting against the high-risk HPV strains most commonly linked to the condition. It works best when given before exposure to HPV. However, the vaccine does not protect against all HPV types, so regular cervical screening remains important even after vaccination.
What does an abnormal Pap test result mean?
An abnormal Pap test result means that some cells from your cervix looked unusual under the microscope — it does not automatically mean you have cancer. Your doctor will recommend further tests, such as a colposcopy or HPV test, to find out more. Most abnormal results turn out to be minor and manageable with appropriate follow-up care.
Can men get HPV-related cancers?
Yes, men can also be affected by high-risk HPV strains, which can lead to cancers of the penis, anus, and throat. HPV spreads through sexual contact and affects both men and women. The HPV vaccine is available and recommended for boys as well as girls in Canada’s publicly funded school immunisation programmes.
Key Takeaways
Cervical dysplasia is an abnormal change in cervical cells, often caused by HPV. It is precancerous, not cancer itself.
HPV is the main cause. High-risk strains like HPV 16 and HPV 18 are responsible for most cervical cancers.
There are usually no symptoms. Regular Pap tests are the best way to detect cervical dysplasia early.
Pap test results range from Class I (normal) to Class V (cancerous). Classes III to V need further investigation.
Treatment options include watchful waiting for mild cases, and LEEP or cone biopsy for more severe dysplasia.
The HPV vaccine is available for free through school programmes across Canada and greatly reduces your risk.
Talk to your family doctor or visit a walk-in clinic to stay up to date with your cervical screening schedule.
