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sábado, 29 de junio de 2019
Childhood Extracranial Germ Cell Tumors Treatment (PDQ®)—Patient Version - National Cancer Institute
This summary is about germ cell tumors that form in parts of the body that are extracranial (outside the brain). Extracranial germ cell tumors usually form in the following areas of the body:
ENLARGEExtracranial germ cell tumors form in parts of the body other than the brain. This includes the testicles, ovaries, sacrum (lower part of the spine), coccyx (tailbone), mediastinum (area between the lungs), retroperitoneum (the back wall of the abdomen), and the head and neck.
Extracranial germ cell tumors are most common in adolescents.
Childhood extracranial germ cell tumors are grouped as gonadal or extragonadal extracranial tumors.
Malignant extracranial germ cell tumors are tumors that form outside the brain. They are gonadal or extragonadal.
Gonadal Germ Cell Tumors
Gonadal germ cell tumors form in the gonads (testicles and ovaries).
Testicular germ cell tumors.Testicular germ cell tumors are divided into two main types, seminoma and nonseminoma. Nonseminomas are usually large and cause signsor symptoms of disease. They tend to grow and spread more quickly than seminomas.
Testicular germ cell tumors usually occur before the age of 4 years or in adolescents and young adults. Testicular germ cell tumors in adolescents (11 years and older) and young adults are different from those that form in early childhood.
Most extragonadal extracranial germ cell tumors form along the midline of the body. This includes the following:
Sacrum (the large, triangle-shaped bone in the lower spine that forms part of the pelvis).
Coccyx (tailbone).
Mediastinum (the area between the lungs).
Back of the abdomen.
Neck.
In children younger than 11 years, extragonadal extracranial germ cell tumors usually occur at birth or in early childhood. Most of these tumors are benign teratomas in the sacrum or coccyx.
In older children, adolescents, and young adults (11 years and older), extragonadal extracranial germ cell tumors are often in the mediastinum.
There are three types of extracranial germ cell tumors.
Extracranial germ cell tumors are also grouped into teratomas, malignant germ cell tumors, and mixed germ cell tumors:
Teratomas
There are two main types of teratomas:
Mature teratomas. These tumors are the most common type of extracranial germ cell tumor. Mature teratomas are benign tumors and not likely to become cancer. They usually occur in the sacrum or coccyx in newborns or in the testicles or ovaries at the start of puberty. The cells of mature teratomas look almost like normal cells under a microscope. Some mature teratomas release enzymes or hormones that cause signs and symptoms of disease.
Immature teratomas. These tumors usually occur in areas other than the gonads in young children or in the ovaries at the start of puberty. They have cells that look very different from normal cells under a microscope. Immature teratomas may be cancer and spread to other parts of the body. They often have several different types of tissue in them, such as hair, muscle, and bone. Some immature teratomas release enzymes or hormones that cause signs and symptoms of disease.
Malignant Germ Cell Tumors
Malignant germ cell tumors are cancer. There are two main types of malignant germ cell tumors:
Seminomatous germ cell tumors. There are three types of seminomatous germ cell tumors:
Seminomas form in the testicle.
Dysgerminomas form in the ovary.
Germinomas form in areas of the body that are not the ovary or testicle, such as the mediastinum.
Non-seminomatous germ cell tumors. There are five types of non-seminomatous germ cell tumors:
Yolk sac tumors make a hormone called alpha-fetoprotein (AFP). They can form in the ovary, testicle, or other areas of the body.
Mixed germ cell tumors are made up of at least two types of malignant germ cell tumor. They can form in the ovary, testicle, or other areas of the body.
The cause of most childhood extracranial germ cell tumors is unknown.
Having certain inherited disorders can increase the risk of extracranial germ cell tumors.
Anything that increases your risk of getting a disease is called a risk factor. Having a risk factor does not mean that you will get cancer; not having risk factors doesn’t mean that you will not get cancer. Talk with your child’s doctor if you think your child may be at risk.
Possible risk factors for extracranial germ cell tumors include the following:
Having gonadal dysgenesis (the gonad—ovary or testicle—has not formed normally) may increase the risk of gonadoblastoma.
Signs of childhood extracranial germ cell tumors depend on where the tumor formed in the body.
Different tumors may cause the following signs and symptoms. Other conditions may cause these same signs and symptoms. Check with a doctor if your child has any of the following:
Imaging studies and blood tests are used to detect (find) and diagnose childhood extracranial germ cell tumors.
The following tests and procedures may be used:
Physical exam and history: An exam of the body to check general signs of health, including checking for signs of disease, such as lumps or anything else that seems unusual. The testicles may be checked for lumps, swelling, or pain. A history of the patient's health habits and past illnesses and treatments will also be taken.
Serum tumor marker test: A procedure in which a sample of blood is checked to measure the amounts of certain substances released into the blood by organs, tissues, or tumor cells in the body. Certain substances are linked to specific types of cancer when found in increased levels in the blood. These are called tumor markers.
Some malignant germ cell tumors release tumor markers. The following tumor markers may be used to detect extracranial germ cell tumors:
Alpha-fetoprotein (AFP).
Beta-human chorionic gonadotropin (β-hCG).
For testicular germ cell tumors, blood levels of the tumor markers help show if the tumor is a seminoma or nonseminoma.
Blood chemistry studies: A procedure in which a blood sample is checked to measure the amounts of certain substances released into the blood by organs and tissues in the body. An unusual (higher or lower than normal) amount of a substance can be a sign of disease.
Chest x-ray: An x-ray of the organs and bones inside the chest. An x-ray is a type of energy beam that can go through the body and onto film, making a picture of areas inside the body.
CT scan (CAT scan): A procedure that makes a series of detailed pictures of areas inside the body, taken from different angles. The pictures are made by a computer linked to an x-ray machine. A dye may be injected into a vein or swallowed to help the organs or tissues show up more clearly. This procedure is also called computed tomography, computerized tomography, or computerized axial tomography.ENLARGEComputed tomography (CT) scan of the abdomen. The child lies on a table that slides through the CT scanner, which takes x-ray pictures of the inside of the abdomen.
MRI (magnetic resonance imaging): A procedure that uses a magnet, radio waves, and a computer to make a series of detailed pictures of areas inside the body. This procedure is also called nuclear magnetic resonance imaging (NMRI).ENLARGEMagnetic resonance imaging (MRI) of the abdomen. The child lies on a table that slides into the MRI scanner, which takes pictures of the inside of the body. The pad on the child’s abdomen helps make the pictures clearer.
Ultrasound exam: A procedure in which high-energy sound waves (ultrasound) are bounced off internal tissues or organs and make echoes. The echoes form a picture of body tissues called a sonogram. The picture can be printed to be looked at later.ENLARGEAbdominal ultrasound. An ultrasound transducer connected to a computer is pressed against the skin of the abdomen. The transducer bounces sound waves off internal organs and tissues to make echoes that form a sonogram (computer picture).
Biopsy: The removal of cells or tissues so they can be viewed under a microscope by a pathologist to check for signs of cancer. Sometimes an incisional biopsy or needle biopsy is done before surgery to remove a sample of tissue. Sometimes the tumor is removed during surgery and then a sample of tissue is removed from the tumor.
The following tests may be done on the sample of tissue that is removed:
Immunohistochemistry: A test that uses antibodies to check for certain antigensin a sample of tissue. The antibody is usually linked to a radioactive substance or a dye that causes the tissue to light up under a microscope. This type of test may be used to tell the difference between different types of cancer.
Certain factors affect prognosis (chance of recovery) and treatment options.
The prognosis (chance of recovery) and treatment options depend on the following:
The patient's age and general health.
The stage of the cancer (whether it has spread to nearby areas, lymph nodes, or to other places in the body).
Whether the tumor can be completely removed by surgery.
Whether the cancer has just been diagnosed or has recurred (come back).
The prognosis for childhood extracranial germ cell tumors, especially ovarian germ cell tumors, is good.
Stages of Childhood Extracranial Germ Cell Tumors
KEY POINTS
After a childhood extracranial germ cell tumor has been diagnosed, tests are done to find out if cancer cells have spread from where the tumor started to nearby areas or to other parts of the body.
There are three ways that cancer spreads in the body.
Cancer may spread from where it began to other parts of the body.
Stages are used to describe the different types of extracranial germ cell tumors.
Testicular germ cell tumors in patients younger than 11 years
Testicular germ cell tumors in patients 11 years and older
Ovarian germ cell tumors
Extragonadal extracranial germ cell tumors
After a childhood extracranial germ cell tumor has been diagnosed, tests are done to find out if cancer cells have spread from where the tumor started to nearby areas or to other parts of the body.
The process used to find out if cancer has spread from where the tumor started to other parts of the body is called staging. The information gathered from the staging process determines the stage of the disease. It is important to know the stage in order to plan treatment. In some cases, staging may follow surgery to remove the tumor.
The following procedures may be used:
MRI (magnetic resonance imaging): A procedure that uses a magnet, radio waves, and a computer to make a series of detailed pictures of areas inside the body, such as the brain or lymph nodes. This procedure is also called nuclear magnetic resonance imaging.
CT scan (CAT scan): A procedure that makes a series of detailed pictures of areas inside the body, such as the chest or lymph nodes, taken from different angles. The pictures are made by a computer linked to an x-ray machine. A dye may be injectedinto a vein or swallowed to help the organs or tissues show up more clearly. This procedure is also called computed tomography, computerized tomography, or computerized axial tomography.
Bone scan: A procedure to check if there are rapidly dividing cells, such as cancer cells, in the bone. A very small amount of radioactive material is injected into a vein and travels through the bloodstream. The radioactive material collects in the bones with cancer and is detected by a scanner.
Thoracentesis: The removal of fluid from the space between the lining of the chest and the lung, using a needle. A pathologist views the fluid under a microscope to look for cancer cells.
Paracentesis: The removal of fluid from the space between the lining of the abdomenand the organs in the abdomen, using a needle. A pathologist views the fluid under a microscope to look for cancer cells.
Tissue. The cancer spreads from where it began by growing into nearby areas.
Lymph system. The cancer spreads from where it began by getting into the lymph system. The cancer travels through the lymph vessels to other parts of the body.
Blood. The cancer spreads from where it began by getting into the blood. The cancer travels through the blood vessels to other parts of the body.
Cancer may spread from where it began to other parts of the body.
When cancer spreads to another part of the body, it is called metastasis. Cancer cells break away from where they began (the primary tumor) and travel through the lymph system or blood.
Lymph system. The cancer gets into the lymph system, travels through the lymph vessels, and forms a tumor (metastatic tumor) in another part of the body.
Blood. The cancer gets into the blood, travels through the blood vessels, and forms a tumor (metastatic tumor) in another part of the body.
The metastatic tumor is the same type of cancer as the primary tumor. For example, if an extracranial germ cell tumor spreads to the liver, the cancer cells in the liver are actually cancerous germ cells. The disease is metastatic extracranial germ cell tumor, not liver cancer.
metastasis: how cancer spreads
Many cancer deaths are caused when cancer moves from the original tumor and spreads to other tissues and organs. This is called metastatic cancer. This animation shows how cancer cells travel from the place in the body where they first formed to other parts of the body.
Stages are used to describe the different types of extracranial germ cell tumors.
Testicular germ cell tumors in patients younger than 11 years
The following stages are from the Children's Oncology Group.
Stage I
In stage I, the cancer is found in the testicle only. The testicle and spermatic cord are completely removed by surgery and all of the following are true:
the capsule (outer covering of the tumor) did not rupture (break open) and a biopsy was not done before the tumor was removed; and
the capsule (outer covering of the tumor) ruptured (broke open) or a biopsy was done before surgery; or
cancer that can only be seen with a microscope remains in the scrotum or in the spermatic cord near the scrotum and after surgery tumor marker levels do not return to normal or do not decrease.
lymph nodes are at least 2 centimeters wide or are larger than 1 centimeter but smaller than 2 centimeters in their shortest diameter and either have not changed or are growing when a CT scan or MRI is repeated within 4 to 6 weeks.
Stage IV
In stage IV, the cancer has spread to other parts of the body, such as the liver, lung, bone, and brain.
Testicular germ cell tumors in patients 11 years and older
See the PDQ summary on Testicular Cancer Treatment for more information about staging used for testicular germ cell tumors in patients 11 years and older.
Ovarian germ cell tumors
Two staging systems are used for ovarian germ cell tumors: Children's Oncology Group and the International Federation of Gynecology and Obstetrics (FIGO).
The following stages are from the Children's Oncology Group.
Stage I
In stage I, the tumor in the ovary is completely removed by surgery and all of the following are true:
the capsule (outer covering of the tumor) did not rupture (break open) and a biopsy was not done before the tumor was removed; and
there is no sign that the cancer has spread through the capsule; and
no cancer is seen in tissue that lines the abdomen or found in tissue samples taken during a biopsy; and
lymph nodes are smaller than 1 centimeter in their shortest diameter on a CT scanor MRI or no cancer is found in lymph node tissue samples taken during a biopsy.
Stage II
In stage II, the tumor in the ovary is completely removed by surgery and a biopsy is done before surgery and one of the following is true:
cancer has spread through all or part of the capsule (outer covering of the tumor); or
the tumor is removed by being broken up into small pieces and it is not known if cancer has spread through the capsule.
Cancer cells are not found in fluid taken from the abdomen. Cancer is not seen in lymph nodes or tissue that lines the abdomen and cancer is not found in tissue samples taken during a biopsy.
Stage III
In stage III, the tumor in the ovary is removed by surgery and one of the following is true:
lymph nodes are at least 2 centimeters wide or are larger than 1 centimeter but smaller than 2 centimeters in their shortest diameter and either have not changed or are growing when a CT scan or MRI is repeated 4 to 6 weeks after surgery; or
the tumor is not completely removed by surgery or a biopsy was done before surgery; or
In stage II, cancer is found in one or both ovaries and has spread into other areas of the pelvis, or primary peritoneal cancer is found. Stage II is divided into stage IIA and stage IIB.
Stage IIA: Cancer has spread to the uterus and/or the fallopian tubes (the long slender tubes through which eggs pass from the ovaries to the uterus).
In stage III, cancer is found in one or both ovaries or primary peritoneal cancer is found. Cancer has spread outside the pelvis to other parts of the abdomen and/or to lymph nodes at the back of the abdomen. Stage III is divided into stage IIIA, stage IIIB, and stage IIIC.
ENLARGETumor sizes are often measured in centimeters (cm) or inches. Common food items that can be used to show tumor size in cm include: a pea (1 cm), a peanut (2 cm), a grape (3 cm), a walnut (4 cm), a lime (5 cm or 2 inches), an egg (6 cm), a peach (7 cm), and a grapefruit (10 cm or 4 inches).
In stage IIIA, one of the following is true:
cancer has spread to lymph nodes at the back of the abdomen only; or
cancer cells that can be seen only with a microscope have spread to the surface of the peritoneum outside the pelvis. Cancer may have spread to nearby lymph nodes at the back of the abdomen.
Stage IIIB: Cancer has spread to the peritoneum outside the pelvis and the cancer in the peritoneum is 2 centimeters or smaller. Cancer may have spread to lymph nodes at the back of the abdomen.
Stage IIIC: Cancer has spread to the peritoneum outside the pelvis and the cancer in the peritoneum is larger than 2 centimeters. Cancer may have spread to lymph nodes at the back of the abdomen or to the surface of the liver or spleen.
cancer is not completely removed by surgery and cancer that can be seen with the eye remains after surgery or only a biopsy was done; or
lymph nodes are at least 2 centimeters wide or are larger than 1 centimeter but smaller than 2 centimeters in their shortest diameter and either have not changed or are growing when a CT scan or MRI is repeated within 4 to 6 weeks.
Stage IV
In stage IV, the cancer has spread to other parts of the body, such as the liver, lung, bone, or brain.
There are different types of treatment for children with extracranial germ cell tumors.
Children with extracranial germ cell tumors should have their treatment planned by a team of health care providers who are experts in treating cancer in children.
Treatment for childhood extracranial germ cell tumors may cause side effects.
Three types of standard treatment are used:
Surgery
Observation
Chemotherapy
New types of treatment are being tested in clinical trials.
High-dose chemotherapy with stem cell transplant
Radiation therapy
Targeted therapy
Patients may want to think about taking part in a clinical trial.
Patients can enter clinical trials before, during, or after starting their cancer treatment.
Follow-up tests may be needed.
There are different types of treatment for children with extracranial germ cell tumors.
Different types of treatments are available for children with extracranial germ cell tumors. Some treatments are standard (the currently used treatment), and some are being tested in clinical trials. A treatment clinical trial is a research study meant to help improve current treatments or obtain information on new treatments for patients with cancer. When clinical trials show that a new treatment is better than the standard treatment, the new treatment may become the standard treatment.
Because cancer in children is rare, taking part in a clinical trial should be considered. Some clinical trials are open only to patients who have not started treatment.
Children with extracranial germ cell tumors should have their treatment planned by a team of health care providers who are experts in treating cancer in children.
Treatment will be overseen by a pediatric oncologist, a doctor who specializes in treating children with cancer. The pediatric oncologist works with other health care providers who are experts in treating children with extracranial germ cell tumors and who specialize in certain areas of medicine. These may include the following specialists:
Treatment for childhood extracranial germ cell tumors may cause side effects.
For information about side effects that begin during treatment for cancer, see our Side Effects page.
Side effects from cancer treatment that begin after treatment and continue for months or years are called late effects. Late effects of cancer treatment may include the following:
Physical problems, such as infertility, trouble hearing and kidney problems.
Changes in mood, feelings, thinking, learning, or memory.
Some late effects may be treated or controlled. It is important to talk with your child's doctors about the effects cancer treatment can have on your child. (See the PDQ summary on Late Effects of Treatment for Childhood Cancer for more information).
Three types of standard treatment are used:
Surgery
Surgery to completely remove the tumor is done whenever possible. If the tumor is very large, chemotherapy may be given first, to make the tumor smaller and decrease the amount of tissue that needs to be removed during surgery. A goal of surgery is to keep reproductive function. The following types of surgery may be used:
Resection: Surgery to remove tissue or part or all of an organ.
After the doctor removes all the cancer that can be seen at the time of the surgery, some patients may be given chemotherapy after surgery to kill any cancer cells that are left. Treatment given after the surgery, to lower the risk that the cancer will come back, is called adjuvant therapy.
Chemotherapy is a cancer treatment that uses drugs to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. When chemotherapy is taken by mouth or injected into a vein or muscle, the drugs enter the bloodstream and can reach cancer cells throughout the body (systemic chemotherapy). When chemotherapy is placed directly into the cerebrospinal fluid, an organ, or a body cavity such as the abdomen, the drugs mainly affect cancer cells in those areas (regional chemotherapy).
The way the chemotherapy is given depends on the type and stage of the cancer being treated. Systemic chemotherapy is used to treat extracranial germ cell tumors.
New types of treatment are being tested in clinical trials.
This summary section describes treatments that are being studied in clinical trials. It may not mention every new treatment being studied. Information about clinical trials is available from the NCI website.
High-dose chemotherapy with stem cell transplant
High doses of chemotherapy are given to kill cancer cells. Healthy cells, including blood -forming cells, are also destroyed by the cancer treatment. Stem cell transplant is a treatment to replace the blood-forming cells. Stem cells (immature blood cells) are removed from the blood or bone marrow of the patient or a donor and are frozen and stored. After the patient completes chemotherapy, the stored stem cells are thawed and given back to the patient through an infusion. These reinfused stem cells grow into (and restore) the body's blood cells.
Radiation therapy
Radiation therapy is a cancer treatment that uses high-energy x-rays or other types of radiation to kill cancer cells or keep them from growing. There are two types of radiation therapy:
The way the radiation therapy is given depends on the type of cancer and whether it has come back. External radiation therapy is being studied for the treatment of childhood extracranial germ cell tumors that have come back.
Targeted therapy
Targeted therapy is a type of treatment that uses drugs or other substances to attack specific cancer cells. Targeted therapy is being studied for the treatment of extracranial germ cell tumors that have come back.
Patients may want to think about taking part in a clinical trial.
For some patients, taking part in a clinical trial may be the best treatment choice. Clinical trials are part of the cancer research process. Clinical trials are done to find out if new cancer treatments are safe and effective or better than the standard treatment.
Many of today's standard treatments for cancer are based on earlier clinical trials. Patients who take part in a clinical trial may receive the standard treatment or be among the first to receive a new treatment.
Patients who take part in clinical trials also help improve the way cancer will be treated in the future. Even when clinical trials do not lead to effective new treatments, they often answer important questions and help move research forward.
Patients can enter clinical trials before, during, or after starting their cancer treatment.
Some clinical trials only include patients who have not yet received treatment. Other trials test treatments for patients whose cancer has not gotten better. There are also clinical trials that test new ways to stop cancer from recurring (coming back) or reduce the side effects of cancer treatment.
Clinical trials are taking place in many parts of the country. Information about clinical trials supported by NCI can be found on NCI’s clinical trials search webpage. Clinical trials supported by other organizations can be found on the ClinicalTrials.gov website.
Follow-up tests may be needed.
Some of the tests that were done to diagnose the cancer or to find out the stage of the cancer may be repeated. Some tests will be repeated in order to see how well the treatment is working. Decisions about whether to continue, change, or stop treatment may be based on the results of these tests.
Some of the tests will continue to be done from time to time after treatment has ended. The results of these tests can show if your child's condition has changed or if the cancer has recurred (come back). These tests are sometimes called follow-up tests or check-ups.
For childhood extracranial germ cell tumors, follow-up may include regular physical exams, tumor marker tests, and imaging tests such as CT scan, MRI or chest x-ray.
Treatment Options for Childhood Extracranial Germ Cell Tumors
Surgery to remove the tumor followed by observation for stage I tumors.
Surgery to remove the tumor for stage II–IV tumors. In young children, surgery is followed by observation; the use of chemotherapy after surgery is controversial. In adolescents and young adults, chemotherapy is given after surgery.
Sometimes a mature or immature teratoma also has malignantcells. A teratoma with malignant cells may need to be treated differently.
Use our clinical trial search to find NCI-supported cancer clinical trials that are accepting patients. You can search for trials based on the type of cancer, the age of the patient, and where the trials are being done. General information about clinical trials is also available.
Surgery (radical inguinal orchiectomy) followed by chemotherapy for stage II-IV tumors.
A clinical trial of a new regimen of surgery followed by observation for stage I tumors or chemotherapy for stage II-IV tumors.
A clinical trial of a new chemotherapy regimen for stage II-IV tumors.
For boys 11 years and older:
Malignant testicular germ cell tumors in boys 11 years and older are treated differently than they are in young boys. (See the PDQ summary on Testicular Cancer Treatment for more information.)
Surgery to remove the tumor. Sometimes lymph nodes in the abdomen are also removed.
A clinical trial of a new regimen of surgery followed by observation for stage I tumors or chemotherapy for stage II-IV tumors.
A clinical trial of a new chemotherapy regimen.
Use our clinical trial search to find NCI-supported cancer clinical trials that are accepting patients. You can search for trials based on the type of cancer, the age of the patient, and where the trials are being done. General information about clinical trials is also available.
Malignant Ovarian Germ Cell Tumors
Dysgerminomas
Treatment of stage I dysgerminomas of the ovary may include the following:
Use our clinical trial search to find NCI-supported cancer clinical trials that are accepting patients. You can search for trials based on the type of cancer, the age of the patient, and where the trials are being done. General information about clinical trials is also available.
Biopsy followed by chemotherapy and possibly surgery for stage III and IV tumors.
In addition to stage of the disease, treatment of malignant extragonadal extracranial germ cell tumors also depends on where the tumor formed in the body:
For tumors in the sacrum or coccyx, chemotherapy to shrink the tumor followed by surgery to remove the sacrum and/or coccyx.
For tumors in the mediastinum, chemotherapy before or after surgery to remove the tumor in the mediastinum.
For tumors in the abdomen, biopsy followed by chemotherapy to shrink the tumor and surgery to remove the tumor in the abdomen.
For tumors in the head and neck, surgery to remove the tumor in the head or neck followed by chemotherapy.
Treatment of childhood malignant extragonadal extracranial germ cell tumors in adolescents and young adults may include the following:
Surgery.
Chemotherapy.
Chemotherapy followed by surgery to remove the tumor.
Use our clinical trial search to find NCI-supported cancer clinical trials that are accepting patients. You can search for trials based on the type of cancer, the age of the patient, and where the trials are being done. General information about clinical trials is also available.
A clinical trial that checks a sample of the patient's tumor for certain gene changes. The type of targeted therapy that will be given to the patient depends on the type of gene change.
A clinical trial of chemotherapy alone compared with high-dose chemotherapy followed by stem cell transplant.
Use our clinical trial search to find NCI-supported cancer clinical trials that are accepting patients. You can search for trials based on the type of cancer, the age of the patient, and where the trials are being done. General information about clinical trials is also available.
Physician Data Query (PDQ) is the National Cancer Institute's (NCI's) comprehensive cancer information database. The PDQ database contains summaries of the latest published information on cancer prevention, detection, genetics, treatment, supportive care, and complementary and alternative medicine. Most summaries come in two versions. The health professional versions have detailed information written in technical language. The patient versions are written in easy-to-understand, nontechnical language. Both versions have cancer information that is accurate and up to date and most versions are also available in Spanish.
PDQ is a service of the NCI. The NCI is part of the National Institutes of Health (NIH). NIH is the federal government’s center of biomedical research. The PDQ summaries are based on an independent review of the medical literature. They are not policy statements of the NCI or the NIH.
Purpose of This Summary
This PDQ cancer information summary has current information about the treatment of childhood extracranial germ cell tumors. It is meant to inform and help patients, families, and caregivers. It does not give formal guidelines or recommendations for making decisions about health care.
Reviewers and Updates
Editorial Boards write the PDQ cancer information summaries and keep them up to date. These Boards are made up of experts in cancer treatment and other specialties related to cancer. The summaries are reviewed regularly and changes are made when there is new information. The date on each summary ("Updated") is the date of the most recent change.
The information in this patient summary was taken from the health professional version, which is reviewed regularly and updated as needed, by the PDQ Pediatric Treatment Editorial Board.
Clinical Trial Information
A clinical trial is a study to answer a scientific question, such as whether one treatment is better than another. Trials are based on past studies and what has been learned in the laboratory. Each trial answers certain scientific questions in order to find new and better ways to help cancer patients. During treatment clinical trials, information is collected about the effects of a new treatment and how well it works. If a clinical trial shows that a new treatment is better than one currently being used, the new treatment may become "standard." Patients may want to think about taking part in a clinical trial. Some clinical trials are open only to patients who have not started treatment.
Clinical trials can be found online at NCI's website. For more information, call the Cancer Information Service (CIS), NCI's contact center, at 1-800-4-CANCER (1-800-422-6237).
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