Treatment for Cancer
How is cancer treated?
The group of healthcare professionals who work together to find, treat, and care for people with cancer is called the "cancer care team." The cancer care team may include any or all of the following healthcare providers, in addition to others:
- primary care physicians
- oncology specialists (medical oncologist, radiation oncologist, surgical oncologist)
- surgeons (including surgical specialists such as urologists, gynecologists, and neurosurgeons)
- oncology nurse specialists
- oncology social workers
- pastoral care
- respiratory therapists
- physical therapists
- lab technicians
- child life therapists
- radiation technicians
Specific treatment for cancer will be determined by your child's physician based on:
- your child's age, overall health, and medical history
- type of cancer
- extent of disease
- development of new treatment options
- your child's tolerance for specific medications, procedures, or therapies
- expectations for the course of the disease
- your opinion or preference
Treatment for certain types of cancer may include:
- antibiotics (to prevent and treat infections)
- supportive care (to treat the side effects of treatment, such as nausea, diarrhea, anemia, and mouth sores)
- surgery (for organ or tumor removal)
- placement of a central line
A central line is a catheter placed in a large vein that supplies the circulatory system. A central line is needed for insertion of medications and blood products, and to provide a site where blood samples can be easily taken without pain to the child. There are several different types of central lines that are used in the treatment of cancer. Your child's physician will explain the benefits of the available central lines.
- continual follow-up care to determine response to treatment, detect recurrence of disease, and manage the effects of treatment.
- biological response modifiers and immunotherapy
Colony-stimulating factors, interleukins, monoclonal antibodies, tumor necrosis factor, interferons, cytokines, and the development of other biological response modifiers are the latest advances in the fight against cancer. Many of these modifiers are normally found in the body and assist with the immune system's ability to protect the body against invasion.
In addition, physicians are using the body's own processes to fight disease. In the near future, there may be a development that can make our bodies recognize cancer cells and destroy them or simply filter them out like common viruses.
The two most common forms of treatment for cancer include chemotherapy and radiation therapy.
What is chemotherapy?
Chemotherapy is the use of anticancer drugs to treat cancerous cells. Chemotherapy has been used for many years and is one of the most common treatments for cancer. In most cases, chemotherapy works by interfering with the cancer cell's ability to grow or reproduce. Different groups of drugs work in different ways to fight cancer cells. Chemotherapy may be used alone for some types of cancer or in combination with other treatments such as radiation or surgery. Often, a combination of chemotherapy drugs is used to fight a specific cancer. Certain chemotherapy drugs may be given in a specific order depending on the type of cancer it is being used to treat.
While chemotherapy can be quite effective in treating certain cancers, chemotherapy drugs reach all parts of the body, not just the cancer cells. Because of this, there may be many side effects during treatment. Being able to anticipate these side effects can help you and your caregivers prepare and, in some cases, prevent these symptoms from occurring.
How does chemotherapy work?
In most cases, chemotherapy works by interfering with the cancer cell's ability to grow or reproduce. Different groups of drugs work in different ways to fight cancer cells. Often a combination of chemotherapy drugs is used to fight a specific cancer.
How is chemotherapy administered?
Chemotherapy can be given:
- as a pill to swallow.
- as an injection into the muscle or fat tissue.
- intravenously (directly to the bloodstream; also called IV).
- topically (applied to the skin)
- directly into a body cavity
What are the side effects of chemotherapy?
Chemotherapy interferes with fast-growing cancer cells, but it also affects some healthy cells. Before receiving chemotherapy for treatment of cancer, many tests are performed to evaluate the baseline (pre-treatment) function of heart, kidneys, lungs, eyes, ears, and reproductive organs. Some chemotherapy may affect the function of these organs either during treatment or months to years after treatment. Some treatment may affect fertility. Other potential side effects may include, but are not limited to, the following:
- bone marrow suppression
Red blood cells that carry oxygen, white blood cells that fight infection, and platelets that help the blood to clot are usually lowered with chemotherapy use. Risk for anemia, fatigue, infection, and bleeding are increased with bone marrow suppression.
- mouth sores, nausea, vomiting, and diarrhea
Chemotherapy affects the fast-growing cells of the mouth and gastrointestinal (GI) tract.
- hair loss, also called "alopecia"
Chemotherapy affects the cells of the hair and nails. After treatment is completed, most children's hair will grow back. Texture of hair and fingernails may change.
What is radiation therapy?
Radiation therapy (also called therapeutic radiology or radiation oncology) uses special kinds of energy waves or particles to fight cancer. Like surgery, radiation therapy is used in several ways depending on the type and location of the cancer. Certain levels of radiation work to destroy cancer cells or prevent cells from growing or reproducing. This treatment may provide a cure for cancer, control the disease, or help relieve its symptoms.
Although each hospital may have specific protocols, radiation therapy usually begins with these procedures:
- simulation process
After a physical examination and a review of your medical history, your treatment team "maps" out the position you will be in for each treatment and the exact location on your body (referred to as treatment field or port) where the radiation will be given (the simulation process). Sometimes, the area on your body that requires treatment will be marked to make sure radiation is given properly. The treatment team may also make molds, headrests, or other devices that help to position you during your treatment. Imaging studies may also be performed during the simulation process to help plan how to direct the radiation during your treatments.
- treatment plan
Once the simulation process is completed, the radiation oncologist will determine your treatment plan, including the type of machine to use, the amount of radiation that is needed, and the number of treatments that will be given.
What are the different types of radiation therapy?
Radiation therapy is given through different methods, depending on the type of cancer, the location of the cancer, and the patient's health. Sometimes, radiation therapy is used in combination with other treatments. The following are some of the different types of radiation therapy with brief explanations of their goals:
- external radiation (external beam therapy)
With external radiation (external beam therapy), radiation is administered by a large machine that points the energy waves directly at the tumor. The radiation therapist controls the machine. Since radiation is used to kill cancer cells, special shields may be made to protect the tissue surrounding the treatment area. Radiation treatments are painless and usually last a few minutes.
- internal radiation (brachytherapy, implant radiation)
With internal radiation (brachytherapy, implant radiation), a high dose of radiation is given inside the body as close to the cancer as possible. The radiation treatment may be swallowed, injected, or implanted directly into the tumor. Some of the radioactive implants are called “seeds” or “capsules”. Internal radiation involves administering a higher dose of radiation in a shorter time span when compared with external radiation. Some internal radiation treatments stay in the body temporarily; other internal treatments stay in the body permanently, although the radioactive substance loses its radiation within a short period of time. In some cases, both internal and external radiation therapies are used.
What are the side effects of radiation therapy?
The side effects of radiation depend on the dose and location, and if it is internal or external. Before receiving radiation for treatment of cancer, many tests may be performed to evaluate the baseline (pre-treatment) function of heart, kidneys, lungs, eyes, ears and reproductive organs. Some radiation may affect the function of these organs either during treatment or months to years after treatment. Some treatment may affect fertility. The side effects usually relate to the area of the body that is receiving the radiation treatments. Potential side effects may include, but are not limited to, the following:
- hair loss, also called "alopecia"
Hair loss may occur if radiation therapy of the head is given. After treatment is completed, most children's hair will grow back.
- bone growth
Bone growth may also be affected, especially with young children that are still having significant bone growth. Height stature and/or limbs may be shortened because of the effect of radiation.
- skin changes
The skin may be more sensitive, reddened, or irritated after having radiation. Skin care is an important part of radiation treatment. Skin changes are short-term effects of radiation. Your child's physician will explain the necessary prevention and treatment of any skin problems related to radiation.
- diarrhea, nausea, and vomiting
If radiation therapy of the pelvis or abdomen is given, a child may experience diarrhea, nausea, and/or vomiting.
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