Cervical Cancer
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Your cervix is the lower part of your uterus. When abnormal cells grow there, it’s called cervical cancer. There are significant steps you can take to reduce your risk of cervical cancer, including receiving HPV (human papillomavirus) vaccines and early screening tests, such as the Pap (Papanicolaou) tests.
The majority of cervical cancer is due to Human papillomavirus (HPV) infection. HPV infections are extremely common, and most women will acquire HPV at some point in during their lifetime. Most people’s immune systems will clear an HPV infection without it developing into cancer. But some types of HPV aren’t cleared and can transform cervical cells into precancerous cells. If it’s not treated, these cells become cervical cancer. Cervical cancer grows slowly, and most cases of cervical cancer in the US are caught before it spreads thanks to common screening tests.
Types of Cervical Cancer
Squamous cell carcinomas make up 80–90% of cervical cancers. Adenocarcinoma makes up 10–20%. Other rare types of cervical cancer also exist.
The American Cancer Society estimates that about 14,000 people are diagnosed with invasive cervical cancer each year. Invasive cervical cancer is a rare disease, thanks to screening, early detection, and the HPV vaccine.
Almost all cervical cancers are caused by high-risk types of human papillomavirus, or HPV. HPV is the most common sexually transmitted infection in the US. Most sexually active people with cervixes have an HPV infection during their lifetimes.
Reducing Your Risk
Using condoms can reduce your risk of getting HPV.
The HPV vaccine can also greatly reduce your risk for HPV and cervical cancer. The Centers for Disease Control recommends that males and females age 9–26 get vaccinated. Adolescents under 15 years of age should receive two doses of the vaccine, spaced 6 to 12 months apart. People who are 15 years of age or older need three doses of the vaccine administered at 0, 1-2, and 6 months. After 26, people have smaller benefit from the vaccine, because they typically have already been exposed to HPV. However, those between 27-45 can speak with their provider regarding the benefits of getting vaccinated against HPV.
Screening
If you have a cervix, you may need screening for cervical cancer. This depends on several factors, such as age and results from previous tests. Cervical cancer screening can be performed using a Pap test (smear) or HPV testing. Cervical cancer screening should start at age 21, according to American College of Obstetrics and Gynecology guidelines. If you have abnormal results, your doctor may recommend additional evaluation.
Doctors use two tests to initially screen for cervical cancer during a gynecologic exam:
- The Pap smear. A Pap smear involves sampling cervical cells with a brush and spatula. The laboratory will look for abnormal cells. Typically, it’s not a painful procedure.
- The HPV test. This test uses the same cells collected during a pap smear to look for HPV infection. This type of test is typically recommended for those ages 30-64.
Colposcopy
If your screening test results are abnormal, your doctor will perform a colposcopy, which is a diagnostic test. A colposcopy is a more detailed exam of the cervix using a magnifying lens. Your doctor may take more tissue samples (biopsy) to identify the origin and severity of the abnormality. While this procedure can cause more discomfort than a Pap, most women tolerate it without anesthesia or pain medication.
Your doctor will recommend watching and waiting or further treatment, depending on the test results.
LEEP Procedure
LEEP, or loop electrosurgical excision procedure, is used both for diagnosis and treatment of abnormal cells on your cervix. This procedure uses a fine wire loop and an electric current to cut away a thin layer of abnormal tissue. Your doctor will usually perform LEEPs in the clinic after giving local anesthesia. Sometimes, though, the procedure requires outpatient surgery under general anesthesia.
A pathologist will examine the tissue, and the test results will determine if you need further treatment.
Risk Factors
HPV infection is the most important risk factor for cervical cancer, but only a small number of people with HPV have precancerous cells or invasive cancer. You can reduce your risk by getting vaccinated and by using barrier contraception like condoms and dental dams during sex. The HPV infection is a chronic infection.
Other risk factors include:
- Sexual history. Having a higher number of sexual partners and beginning to have sex at a younger age increases the risk of getting an HPV infection and developing cervical cancer.
- Smoking. Smoking reduces the body’s ability to fight HPV infection. Chemicals associated with smoking cigarettes can be found in cervical mucus and can contribute to the development of cervical cancer.
- Immune health. People with HIV or who are taking immunosuppressive medications have a higher risk of developing cervical cancer due to a weakened immune system.
- Other sexually transmitted infections. People with chlamydia, gonorrhea, syphilis, or herpes have a higher risk of also having an HPV infection and therefore developing cervical cancer.
- Lack of screening. Cervical cancer screening with the Pap smear and HPV tests can detect abnormal cells before they turn into cancer. People who don’t get regular cervical cancer screening increase their risk of developing invasive cervical cancer. In the United States, 50% of women diagnosed with cervical cancer never had a pap smear.
Cervical Cancer Symptoms and Diagnosis
Early cervical cancer doesn’t usually have symptoms. They are typically found during regular screening exams, and cure rates are very high for these people.
Symptoms
Once the cancer has invaded deeper into the cervix or nearby organs, you might have symptoms. If you have these symptoms, see your doctor immediately. You may have a biopsy -- a deeper tissue sample -- to help determine the extent of the disease.
- Pelvic pain
- Pain during intercourse
- Vaginal bleeding or spotting, especially after vaginal intercourse, bleeding or spotting in between menstrual periods, bleeding or spotting after menopause, or menstrual periods that are heavier or last longer than usual
- Vaginal discharge that can be watery, bloody, or have a foul odor
Diagnosis and Staging
If your doctor thinks you have more advanced cervical cancer, they will refer you to a gynecologic oncologist. This doctor is specially trained in gynecologic cancers. They may recommend tests that show how far the tumor has grown and spread into the body.
A gynecologic oncologist might recommend the following diagnostic tests:
- A EUA (examination under anesthesia). Done as an outpatient procedure under general anesthesia, a gynecologic oncologist evaluates the bladder, rectum, and tissues surrounding the cervix for cancer spread.
- X-rays
- A CT (computed tomography) scan. CTs convert data from different angles of X-ray images of the body into pictures on a monitor.
- An MRI (magnetic resonance imaging) test. MRIs use powerful magnetic fields to create a 3D picture of the lower abdomen and pelvis to detect tumors.
- A PET (positron emission tomography) scan. PET scans use a small amount of radionuclide glucose (sugar) injected into a vein. The PET scanner rotates around the body and creates a picture of where glucose is being in the body. Malignant tumor cells show up brighter than normal cells do.
Stages
Cancer stages denote whether cancer is confined to its site of origin or has spread into nearby tissues or further into your body. Your cancer’s stage, among other things, will determine your course of treatment.
- Stage I. Cancer is only in the cervix.
- Stage II. Cancer has spread beyond the cervix but has not spread to the pelvic sidewall or the lower third of the vagina.
- Stage III. Cancer has spread to the lower third of the vagina or to the pelvic sidewall.
- Stage IV. Cancer has spread to the bladder, rectum, or other parts of the body, such as lungs, bone, or liver.