An Introduction to Cervical Cancer Treatment
Cervical cancer treatment is a highly developed field of oncology with very effective therapies, particularly when the disease is detected at an early stage. The specific treatment plan for an individual is carefully determined by a number of key factors. The most important of these is the stage of the cancer—that is, the size of the tumor and whether it has spread beyond the cervix. Other critical considerations include the specific type of cervical cancer, the patient’s age, her overall health, and her personal desire regarding future fertility.
Treatment goals are directly related to the stage of the disease. For early-stage and locally advanced cancers, the goal is curative, aiming to completely eliminate the cancer and prevent its return. For metastatic cancer that has spread to distant parts of the body, the goal of treatment shifts to controlling the disease’s progression, managing symptoms, and maintaining the best possible quality of life.
The Role of the Gynecologic Oncology Team
Due to the specific location and nature of the disease, cervical cancer is best managed by a multidisciplinary team (MDT) led by a gynecologic oncologist. This is a subspecialist physician who has training in both surgery and medical oncology for cancers of the female reproductive system. This team-based approach is the standard of care and ensures a coordinated and comprehensive treatment strategy.
The core members of a cervical cancer MDT include:
- Gynecologic Oncologist: A surgeon and physician who typically leads the treatment plan, performs surgery, and may prescribe chemotherapy.
- Radiation Oncologist: A physician who specializes in planning and delivering radiation therapy, a cornerstone of cervical cancer treatment.
- Medical Oncologist: A physician who manages systemic therapies like chemotherapy, targeted therapy, and immunotherapy, particularly for advanced disease.
- Pathologist: A doctor who examines tissue from the cervix to confirm the diagnosis and determine the cancer’s specific type.
- Radiologist: A physician who interprets imaging scans (like PET-CT and MRI) to accurately stage the cancer and monitor response to treatment.
- Palliative Care and Supportive Care Specialists: Professionals who help manage treatment side effects and symptoms of the disease from the time of diagnosis.
Treatment for Early-Stage Cervical Cancer
Early-stage cervical cancer is defined as cancer that is confined to the cervix and has not spread to nearby tissues or distant organs. The treatment for this stage is primarily surgical, with the possibility of preserving fertility in very select cases.
- For Microinvasive Cancer: For the very earliest stage cancers that are microscopic in size, a less extensive surgery may be possible. A cone biopsy, a procedure that removes a cone-shaped piece of tissue from the cervix, can sometimes be both a diagnostic procedure and the complete treatment. For women who do not wish to preserve fertility, a simple hysterectomy (removal of the uterus and cervix) may be an option.
- For Larger Early-Stage Cancers: For visible tumors that are still confined to the cervix, the standard surgical treatment is a radical hysterectomy. This is a more extensive operation than a simple hysterectomy and involves removing the cervix, uterus, the upper part of the vagina, and the supportive tissues around the cervix (the parametria). At the same time, a pelvic lymph node dissection is performed to remove lymph nodes to check for any cancer spread.
In some cases, radiation therapy with or without chemotherapy may be considered as an alternative primary treatment to surgery for early-stage disease.
Treatment for Locally Advanced Cervical Cancer
Locally advanced disease refers to cancer that has grown beyond the cervix to involve nearby structures, such as the upper vagina or the tissues next to the cervix (the parametria), but has not yet spread to distant organs. For this stage, surgery is not the primary treatment.
The definitive, standard-of-care treatment for locally advanced cervical cancer is a combination of radiation therapy and chemotherapy, a regimen known as chemoradiation. This treatment is given with curative intent.
- External Beam Radiation Therapy (EBRT): This involves daily radiation treatments delivered from a machine outside the body, targeting the entire pelvic region to treat the main tumor and any potential cancer spread to the pelvic lymph nodes. This is typically given five days a week for about five to six weeks.
- Concurrent Chemotherapy: During the course of external radiation, patients receive weekly low-dose chemotherapy, usually with a drug called cisplatin. The chemotherapy is not given at a high enough dose to treat the cancer on its own; instead, it acts as a “radiosensitizer,” making the cancer cells more vulnerable to being killed by the radiation.
- Brachytherapy (Internal Radiation): This is a critical and indispensable part of the treatment. After the external radiation course is complete, brachytherapy is performed. It involves temporarily placing a small applicator device into the cervix and uterus. A radioactive source is then placed inside the applicator for a short period to deliver a very high, targeted dose of radiation directly to the remaining tumor, minimizing exposure to nearby healthy organs like the bladder and rectum.
Treatment for Metastatic (Advanced) Cervical Cancer
Metastatic or advanced (Stage IVB) cervical cancer is cancer that has spread to distant organs, such as the lungs, liver, or bones. At this stage, the cancer is not considered curable, and local treatments like surgery or radiation are not the primary approach. Treatment focuses on systemic therapy to control the cancer throughout the body.
- Chemotherapy: The foundation of treatment for metastatic cervical cancer is systemic chemotherapy. This typically involves a combination of a platinum-based drug (like cisplatin or carboplatin) and another drug, such as paclitaxel.
- Targeted Therapy: An anti-angiogenesis drug called bevacizumab can be added to the chemotherapy regimen. This drug works by interfering with the tumor’s ability to form new blood vessels, which it needs to grow.
- Immunotherapy: For some patients, particularly those whose tumors express a protein called PD-L1, immunotherapy may be an option. These drugs, known as immune checkpoint inhibitors, work by helping the body’s own immune system to recognize and attack cancer cells. Immunotherapy can be given in combination with chemotherapy or, in some cases, by itself.
Fertility-Sparing Treatment Options
For some young women with a specific type of early-stage cervical cancer who wish to have children in the future, a fertility-sparing surgical option may be possible. This procedure is called a radical trachelectomy. During a trachelectomy, the surgeon removes the cervix and the upper part of the vagina but leaves the main body of the uterus in place. The uterus is then reattached to the remaining vagina. This allows for the possibility of carrying a pregnancy in the future, although any subsequent delivery would require a Cesarean section. This is a highly specialized procedure that is only appropriate for a very select group of patients. Both radical hysterectomy and pelvic radiation result in permanent infertility.
Frequently Asked Questions
1. What is the difference between a simple hysterectomy and a radical hysterectomy?
A simple hysterectomy involves the removal of the uterus and the cervix. A radical hysterectomy, the standard surgery for early-stage cervical cancer, is a much more extensive operation. It includes the removal of the uterus and cervix, the upper part of the vagina, and the supportive tissues on either side of the cervix (the parametria), along with a full pelvic lymph node dissection.
2. Why is chemoradiation used instead of surgery for locally advanced cervical cancer?
For locally advanced cancer that has grown beyond the cervix into nearby tissues, surgery is unlikely to be able to remove all of the cancer with clear margins. Studies have shown that a combination of external radiation, internal radiation (brachytherapy), and concurrent chemotherapy provides the best chance for a cure in this situation. It is more effective at treating both the primary tumor and any microscopic spread to the pelvic lymph nodes.
3. What is brachytherapy and why is it so important?
Brachytherapy is a type of internal radiation therapy that is a crucial part of the curative treatment for locally advanced cervical cancer. It involves temporarily placing an applicator inside the cervix and uterus, which allows a radioactive source to deliver a very high, concentrated dose of radiation directly to the tumor. This technique is essential for destroying the core of the tumor while minimizing radiation damage to the surrounding healthy bladder and rectum.
4. Can a woman’s fertility be preserved during cervical cancer treatment?
In very specific circumstances, yes. For some young women with small, early-stage tumors, a fertility-sparing surgery called a radical trachelectomy may be an option. This procedure removes the cervix but preserves the uterus. However, for most patients, treatment with either a radical hysterectomy or pelvic radiation will result in permanent infertility.
5. What is the purpose of chemotherapy in the chemoradiation regimen?
In the treatment of locally advanced cervical cancer, the low-dose chemotherapy given alongside radiation is not intended to cure the cancer on its own. Its purpose is to act as a “radiosensitizer.” It makes the cancer cells more vulnerable and enhances the cell-killing effects of the radiation therapy, thereby increasing the overall effectiveness of the treatment.
6. How is metastatic cervical cancer treated?
Metastatic cervical cancer, which has spread to distant organs, is treated with systemic therapies that circulate throughout the body. The primary treatment is chemotherapy, often combined with a targeted therapy drug (bevacizumab) that blocks tumor blood vessel growth. For some patients, immunotherapy, which helps the body’s own immune system fight the cancer, is also an option.
7. What is a cone biopsy?
A cone biopsy is a procedure where a surgeon removes a cone-shaped piece of tissue from the cervix. It serves two purposes: it can be used to diagnose cervical cancer, and for very small, microinvasive cancers, it can sometimes serve as the complete treatment by removing all of the cancerous cells.
