Childhood non-Hodgkin lymphoma is a disease in which malignant (cancer) cells form in the lymph system.

The lymph system is part of the immune system and is made up of the following:

  • Lymph: Colorless, watery fluid that travels through the lymph system and carries white blood cells called lymphocytes. Lymphocytes protect the body against infections and the growth of tumors.
  • Lymph vessels: A network of thin tubes that collect lymph from different parts of the body and return it to the bloodstream.
  • Lymph nodes: Small, bean-shaped structures that filter substances in lymph and help fight infection and disease. Lymph nodes grow along the network of lymph vessels found throughout the body. Clusters of lymph nodes are found in the underarm, pelvis, neck, abdomen, and groin.
  • Spleen: An organ that makes lymphocytes, filters the blood, stores blood cells, and destroys old blood cells. The spleen is on the left side of the abdomen near the stomach.
  • Thymus: An organ in which lymphocytes grow and multiply. The thymus is in the chest behind the breastbone.
  • Tonsils: Two small masses of lymph tissue at the back of the throat. The tonsils make lymphocytes.
  • Bone marrow: The soft, spongy tissue in the center of large bones. Bone marrow makes white blood cells, red blood cells, and platelets.

Because lymph tissue is found throughout the body, childhood non-Hodgkin lymphoma can begin in almost any part of the body. Cancer can spread to the liver and many other organs and tissues.

There are four major types of childhood non-Hodgkin lymphoma. 

  • B-cell non-Hodgkin lymphoma (Burkitt and Burkitt-like lymphoma) and Burkitt leukemia.
  • Diffuse large B-cell lymphoma.
  • Lymphoblastic lymphoma.
  • Anaplastic large cell lymphoma.

There are other types of lymphoma that occur in children. These include the following: 

  • Lymphoproliferative disease associated with a weakened immune system.
  • Adult non-Hodgkin lymphoma. This type of lymphoma occurs rarely in children.

 

Warning Signs

Possible signs of childhood non-Hodgkin lymphoma include breathing problems and swollen lymph nodes.

These and other symptoms may be caused by childhood non-Hodgkin lymphoma. Other conditions may cause the same symptoms. A doctor should be consulted if any of the following problems occur:

  • Shortness of breath.
  • Trouble breathing.
  • Wheezing.
  • High-pitched breathing sounds.
  • Swelling of the head or neck.
  • Trouble swallowing.
  • Painless swelling of the lymph nodes in the neck, underarm, stomach, or groin.
  • Fever for no known reason.
  • Weight loss for no known reason.
  • Night sweats.

Tests that examine the body and lymph system are used to detect (find) and diagnose childhood non-Hodgkin lymphoma.

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. A history of the patient’s health habits and past illnesses and treatments will also be taken.
  • Biopsy: The removal of cells or tissues so they can be viewed under a microscope by a pathologist to check for signs of cancer. One of the following types of biopsies may be done:
    • Excisional biopsy: The removal of an entire lump, lymph node, or suspicious tissue.
    • Incisional biopsy or core biopsy: The removal of part of a lump, lymph node, or suspicious tissue.
    • Needle biopsy or fine-needle aspiration: The removal of part of a lump, lymph node, or suspicious tissue using a thin needle.
    • Bone marrow aspiration and biopsy: The removal of bone marrow, blood, and a small piece of bone by inserting a needle into the hipbone or breastbone. A pathologist views the bone marrow, blood, and bone under a microscope to look for signs of cancer.
  • 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.
  • 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.

Certain factors affect prognosis (chance of recovery) and treatment options.

The prognosis (chance of recovery) and treatment options depend on:

  • The stage of the cancer.
  • The number of places outside of the lymph nodes to which the cancer has spread.
  • The type of lymphoma.
  • The patient’s general health.

Stages

After childhood non-Hodgkin lymphoma has been diagnosed, tests are done to find out if cancer cells have spread within the lymph system or to other parts of the body.

The process used to find out if cancer has spread within the lymph system or 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. Some of the tests that are used to diagnose childhood non-Hodgkin lymphoma are also used to stage the disease. The following tests and procedures may be used in the staging process:

  • 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. A history of the patient’s health habits and past illnesses and treatments will also be taken.
  • Complete blood count (CBC): A procedure in which a sample of blood is drawn and checked for the following:
    • The number of red blood cells, white blood cells, and platelets.
    • The amount of hemoglobin (the protein that carries oxygen) in the red blood cells.
    • The portion of the sample made up of red blood cells.
  • 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 in the organ or tissue that makes it.
  • 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.
  • 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.
  • Gallium scan: A procedure to detect areas of the body where cells, such as cancer cells, are dividing rapidly. A very small amount of radioactive material, gallium, is injected into a vein and travels through the bloodstream. The gallium collects in the bones or other tissues (organs) and is detected by a scanner.
  • Bone marrow aspiration and biopsy: The removal of bone marrow, blood, and a small piece of bone by inserting a needle into the hipbone or breastbone. A pathologist views the bone marrow, blood, and bone under a microscope to look for signs of cancer.
  • Lumbar puncture: A procedure used to collect cerebrospinal fluid from the spinal column. This is done by placing a needle into the spinal column. This procedure is also called an LP or spinal tap.
  • 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 and is detected by a scanner.
  • 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).
  • Endoscopy: A procedure to look at organs and tissues inside the body to check for abnormal areas. An endoscope is inserted through an incision (cut) in the skin or opening in the body, such as the mouth. An endoscope is a thin, tube-like instrument with a light and a lens for viewing. It may also have a tool to remove tissue or lymph node samples, which are checked under a microscope for signs of disease.

The following stages are used for childhood non-Hodgkin lymphoma:

Stage I

In stage I childhood non-Hodgkin lymphoma, cancer is found in a single area or lymph node outside of the abdomen or chest.

Stage II

In stage II childhood non-Hodgkin lymphoma, cancer is found:

  • in only one area and in the lymph nodes around it; or
  • in 2 or more areas or lymph nodes on one side of the diaphragm (the thin muscle under the lungs that divides the chest and abdominal cavity and helps with breathing); or
  • to have started in the stomach or intestines and has been completely removed by surgery, and lymph nodes in the area may or may not have cancer.

Stage III

In stage III childhood non-Hodgkin lymphoma, cancer is found:

  • in areas or lymph nodes on both sides of the diaphragm; or
  • to have started in the chest; or
  • in more than one place in the abdomen; or
  • in the area around the spine.

Stage IV

In stage IV childhood non-Hodgkin lymphoma, cancer is found in the bone marrow, brain, or spinal cord. Cancer may also be found in other parts of the body.

Childhood non-Hodgkin lymphoma is also described as localized or disseminated.

Treatment for childhood non-Hodgkin lymphoma is based on whether the cancer is localized or disseminated. Localized lymphoma has not spread beyond the area in which it began. Disseminated lymphoma has spread beyond the area in which it began. Stage I and stage II are usually considered localized. Stage III and stage IV are usually considered disseminated.

Treatment

There are different types of treatment for children with non-Hodgkin lymphoma.

Different types of treatment are available for children with non-Hodgkin lymphoma. Some treatments are standard (the currently used treatment), and some are being tested in clinical trials. Before starting treatment, patients may want to think about taking part in a clinical trial. 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.

Children with non-Hodgkin lymphoma should have their treatment planned by a team of doctors with expertise in treating childhood cancer.

Your child’s treatment will be overseen by a pediatric oncologist, a doctor who specializes in treating children with cancer. The pediatric oncologist may refer you to other pediatric doctors who have experience and expertise in treating children with non-Hodgkin lymphoma and who specialize in certain areas of medicine. These may include the following specialists:

  • Radiation oncologist.
  • Pediatric hematologist.
  • Pediatric surgeon.
  • Pediatric nurse specialist.
  • Rehabilitation specialist.
  • Psychologist.
  • Social worker.

Three types of standard treatment are used:

Chemotherapy

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 spinal column (intrathecal chemotherapy), an organ, or a body cavity such as the abdomen, the drugs mainly affect cancer cells in those areas. Intrathecal chemotherapy may be used to treat childhood non-Hodgkin lymphoma that has spread, or may spread, to the brain. When used to prevent spread to the brain, it is called CNS prophylaxis. The way the chemotherapy is given depends on the type and stage of the cancer being treated.

Combination chemotherapy is treatment using 2 or more anticancer drugs.

Radiation therapy (in certain patients)

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. External radiation therapy uses a machine outside the body to send radiation toward the cancer. Internal radiation therapy uses a radioactive substance sealed in needles, seeds, wires, or catheters that are placed directly into or near the cancer. When radiation therapy is used to prevent spread to the brain, it is called CNS prophylaxis. The way the radiation therapy is given depends on the type and stage of the cancer being treated.

High-dose chemotherapy with stem cell transplant

This treatment is a way of giving high doses of chemotherapy and then replacing blood-forming cells destroyed by the cancer treatment. Stem cells (immature blood cells) are removed from the bone marrow or blood of the patient or a donor and are frozen and stored. After the chemotherapy is completed, 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.

New types of treatment are being tested in clinical trials. These include the following:

Monoclonal antibody therapy

Monoclonal antibody therapy is a cancer treatment that uses antibodies made in the laboratory from a single type of immune system cell. These antibodies can identify substances on cancer cells or normal substances that may help cancer cells grow. The antibodies attach to the substances and kill the cancer cells, block their growth, or keep them from spreading. Monoclonal antibodies are given by infusion. They may be used alone or to carry drugs, toxins, or radioactive material directly to cancer cells.

Localized Non-Hodgkin Lymphoma in Children and Adolescents

Standard treatment of localized non-Hodgkin lymphoma in children and adolescents is usually surgery followed by combination chemotherapy.

New treatments are being studied in clinical trials for localized non-Hodgkin lymphoma in children and adolescents. Information about ongoing clinical trials is available from the NCI Web site.

Disseminated Childhood B-cell Non-Hodgkin Lymphoma

Standard treatment for disseminated B-cell (Burkitt and Burkitt-like) non-Hodgkin lymphoma in children and adolescents is usually combination chemotherapy with CNS prophylaxis (intrathecal chemotherapy).

Monoclonal antibody therapy combined with chemotherapy is being studied in clinical trials for disseminated B-cell non-Hodgkin lymphoma in children and adolescents. Information about this and other ongoing clinical trials is available from the NCI Web site.

Disseminated Childhood Lymphoblastic Lymphoma

Standard treatment of disseminated lymphoblastic lymphoma children and adolescents is usually combination chemotherapy with or without radiation therapy to the brain.

New combinations of chemotherapy, with and without CNS prophylaxis (intrathecal chemotherapy), are being studied in clinical trials for disseminated lymphoblastic lymphoma in children and adolescents. Information about these and other ongoing clinical trials is available from the NCI Web site.

Disseminated Childhood Anaplastic Large-cell Lymphoma

Standard treatment of disseminated large-cell non-Hodgkin lymphoma in children and adolescents is usually combination chemotherapy with or without CNS prophylaxis (intrathecal chemotherapy).

New combinations of chemotherapy are being studied in clinical trials for disseminated large-cell non-Hodgkin lymphoma in children and adolescents. Information about these and other ongoing clinical trials is available from the NCI Web site.

Recurrent Childhood Non-Hodgkin Lymphoma

Recurrent childhood non-Hodgkin lymphoma is cancer that has recurred (come back) after it has been treated. Childhood non-Hodgkin lymphoma may come back in the lymph system or in other parts of the body.

Standard treatment of recurrent childhood non-Hodgkin lymphoma in children and adolescents may include the following:

  • High-dose chemotherapy with stem cell transplant.
  • Combination chemotherapy.

 

 

lymphoproliferative disorder

A disease in which cells of the lymphatic system grow excessively. Lymphoproliferative disorders are often treated like cancer.

Lymphoproliferative Disease Associated with a Weakened Immune System

Standard treatment of lymphoproliferative disease in children and adolescents with weakened immune systems may include the following:

  • Surgery with or without radiation therapy.
  • Combination chemotherapy.

Some of the treatments being studied in clinical trials include the following:

  • Monoclonal antibody therapy combined with chemotherapy.
  • Stem cell transplant followed by donor lymphocyte infusion or an infusion of T-cell lymphocytes that have been treated in the laboratory.

 

Source:  National Cancer Institute