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Chemotherapy (chemo) is the use of drugs to treat cancer. Most often, chemo is a systemic treatment, meaning the drugs enter the bloodstream and reach almost all areas of the body. Chemo can be useful to kill very small amounts of cancer cells that may still be around after surgery, for cancers that have metastasized (spread), or to shrink very large tumors to make surgery easier. Most of the time, chemo uses drugs that are injected into a vein (IV) or given by mouth. In some cases, chemotherapy may also be injected through a catheter (thin tube) directly into the abdominal cavity. This is called intraperitoneal (IP) chemotherapy.
Chemo for ovarian cancer usually involves getting two different types of drugs together. Getting a combination of drugs instead of just one drug alone seems to work better as a first treatment for ovarian cancer. Usually, the combination includes a type of chemo drug called a platinum compound (usually cisplatin or carboplatin), and another type of chemo drug called a taxane, such as paclitaxel (Taxol®) or docetaxel (Taxotere®). These drugs are usually given as an IV (put into a vein) every 3 to 4 weeks.
The typical course of chemo for epithelial ovarian cancer involves 3 to 6 cycles of treatment, depending on the stage and type of ovarian cancer. A cycle is a schedule of regular doses of a drug, followed by a rest period. Different drugs have varying cycles; your doctor will let you know what schedule is planned for your chemo.
Epithelial ovarian cancer often shrinks or even seems to go away with chemo, but the cancer cells may eventually begin to grow again. If the first chemo seemed to work well and the cancer stayed away for at least 6 to 12 months, it can be treated with the same chemotherapy used the first time. In some cases, different drugs may be used.
Some of the other chemo drugs that are helpful in treating ovarian cancer include:
For women who have stage III ovarian cancer (cancer that has not spread outside the abdomen) and whose cancers were optimally debulked (no tumors larger than 1 cm after surgery), intraperitoneal (IP) chemotherapy might be given in addition to systemic chemo (paclitaxel given in a vein).
In IP chemotherapy, the drugs cisplatin and paclitaxel are injected into the abdominal cavity through a catheter (thin tube). The tube can be placed during the staging/debulking surgery, but sometimes it is placed later. If it is done later, it can be placed by a surgeon using laparoscopy, or by an interventional radiologist under x-ray guidance. The catheter is usually connected to a port, a half dollar-sized disk topped with a pliable diaphragm. The port is placed under the skin against a bony structure of the abdominal wall, such as a rib or pelvic bone. A needle can be placed through the skin and into the port to give chemo and other drugs. Over time, problems may occur with the catheter (for example, it might become plugged or infected), but this is rare. .
Giving chemo this way gives the most concentrated dose of the drugs directly to the cancer cells in the abdominal cavity. This chemo also gets absorbed into the bloodstream and so can reach cancer cells outside the abdominal cavity. IP chemotherapy seems to help some women live longer than IV chemo alone, but the side effects are often more severe. Women getting IP chemotherapy might have more abdominal pain, nausea, vomiting, and other side effects, which might make some women stop their treatment early. The risk of side effects also means a woman must have normal kidney function and be in good overall heath before starting IP chemo. Women also cannot have a lot of adhesions or scar tissue inside their abdomen (belly) because this can keep the chemo from reaching all the exposed cancer cells.
If you have a germ cell tumor, you will likely be treated with combination chemo (several different drugs at once). The combination used most often is called BEP, and includes the chemotherapy drugs bleomycin, etoposide and cisplatin (Platinol). If the cancer is a dysgerminoma, these are usually very sensitive to chemotherapy, and can sometimes be treated with the less toxic combination of carboplatin and etoposide. Other drug combinations may be used if the cancer isn’t responding to treatment or to treat cancer that has recurred (come back). These include:
Ovarian stromal tumors are not often treated with chemotherapy, but when they are, the combination of carboplatin plus paclitaxel or PEB (cisplatin/Platinol, etoposide, and bleomycin) is used most often.
Chemo drugs can cause side effects. These depend on the type and dose of drugs given, and the length of treatment. Some of the most common possible side effects include:
Chemo can also affect the blood-forming cells of the bone marrow, which can lead to:
These side effects usually go away after treatment is finished. While you are in treatment, tell your cancer care team about any side effects you are having. There are often ways to lessen these side effects. For example, drugs can be given to help prevent or reduce nausea and vomiting.
Some chemo drugs may have long-term or even permanent side effects:
Other drugs can have other side effects, so ask your doctor what side effects to expect from the drugs that you will receive. Most side effects improve once treatment is stopped, but some can last a long time and may never go away completely.
Our team is made up of doctors and oncology certified nurses with deep knowledge of cancer care as well as journalists, editors, and translators with extensive experience in medical writing.
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Last Revised: April 11, 2018
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