Childhood Cancer: What Parents Need to Know — From Early Signs to Treatment and Hope
Updated: 3 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 17, 2026
Quick Answer
Childhood cancer is a group of cancers affecting children ages 0 to 19. About 15,000 U.S. children are diagnosed each year; it is uncommon but treatable and often curable. Leukemia is the most common type, followed by brain and spinal cord tumors. More than 8 in 10 children in high-income countries are cured, though survivors need lifelong follow-up.
What the research says
According to PubMed:
Fewer survivors are dying of late effects. In a cohort of 34,033 people who survived at least five years after childhood cancer treated between 1970 and 1999, the 15-year risk of death from any cause fell from 12.4% in the early 1970s to 6.0% in the 1990s, and the risk of death from health-related late effects fell from 3.5% to 2.1%. The authors linked the decline to reduced exposure to radiotherapy and anthracycline chemotherapy (Armstrong et al., N Engl J Med, 2016 [1]).
Most survivors still face long-term health problems. A JAMA review reported that more than 85% of the roughly 15,000 U.S. children and adolescents diagnosed each year survive at least 5 years, but by age 45 about 95% of survivors develop a significant health problem related to the diagnosis or its treatment. Among severe or life-threatening chronic conditions, endocrine disorders were most common (44%), followed by subsequent neoplasms (7%) and cardiovascular disease (5.3%) (Bhatia et al., JAMA, 2023 [2]).
Radiotherapy, second cancers, and heart disease cost the most life years. In a French cohort of 7,670 five-year survivors, a subsequent malignant neoplasm (9.0 years lost), severe cardiac disease (8.0 years), and radiotherapy (6.0 years) contributed most to life years lost, so the authors advised close monitoring after a second cancer or heart disease (Charrier et al., Cancer Epidemiol, 2024 [3]).
Study details are from PubMed abstracts.
What Is Childhood Cancer?
Childhood cancer describes a group of cancers that affect children ages 0 to 19. It covers two subgroups: pediatric cancers, which affect infants through children age 14, and adolescent cancers, which affect children ages 15 to 19.
Approximately 15,000 children in the U.S. are diagnosed with cancer each year. Childhood cancers are uncommon, but they can be treated and often cured. Overall, more than 80% of children and teenagers with cancer are alive five years after diagnosis.
It is also important to understand that treatment casts a long shadow. A child who beats cancer will usually need lifelong care to keep tabs on how the disease and its treatment may affect their health for decades.
Term | What It Means |
|---|---|
Pediatric cancer | Cancer affecting infants through children age 14 |
Adolescent cancer | Cancer affecting children ages 15 to 19 |
Remission | No more signs or symptoms of cancer |
Cure | Applied when cancer goes into remission and stays gone |
Late effects | Health issues that appear after treatment ends, years later |
Metastasis | The spread of cancer from its original site |
What Are the Types of Childhood Cancer?
There are three groups of childhood cancers: leukemias and lymphomas, brain and spinal cord tumors, and solid tumors. Each group starts in different cells and behaves differently.
Group | Where It Starts | Relative Frequency |
|---|---|---|
Leukemias and lymphomas | Blood-forming cells in bone marrow or the lymphatic system | Leukemia: most common; lymphoma: third most common |
Brain and spinal cord tumors | Cells of the central nervous system | Affect over 5,000 U.S. kids each year |
Solid tumors | Cells throughout the body that divide into masses | Includes bone, liver, eye, muscle, and kidney cancers |
What Are Leukemias and Lymphomas?
Leukemia and lymphoma are blood cancers. Leukemia is the most common type of childhood cancer. It starts in the bone marrow — the spongy tissue inside bones where blood cells get made. Lymphoma, the third most common type, starts in blood-forming cells in the lymphatic system — the body's network of fluid, glands, and vessels that fights infection.
Cancer | How It Starts | Common Subtypes |
|---|---|---|
Acute lymphoblastic leukemia (ALL) | Bone marrow | The most common childhood cancer diagnosis overall |
Acute myeloid leukemia (AML) | Bone marrow | Several subtypes |
Hodgkin lymphoma | Lymphatic system | Especially nodular sclerosis and mixed cellularity types |
Non-Hodgkin lymphoma | Lymphatic system | Especially Burkitt, diffuse large B-cell, anaplastic large-cell, and lymphoblastic lymphoma |
What Are Brain and Spinal Cord Tumors?
Brain and spinal cord tumors affect over 5,000 kids in the U.S. each year. They happen when cells that are a normal part of the central nervous system (the brain and spinal cord) transform into cancer cells. Types include choroid plexus carcinoma, embryonal tumor, ganglioglioma, glioma, medulloblastoma, and pineoblastoma.
What Are Solid Tumors?
Solid tumors develop when cancerous cells divide, multiply, and form masses. They can grow throughout a child's body, in bones, organs, muscles, and soft tissue.
Solid Tumor | What It Affects |
|---|---|
Osteosarcoma | Bone (the most common bone cancer in children) |
Ewing sarcoma | Bone and soft tissue |
Germ cell tumor | Cells that form eggs and sperm; may also occur in the brain |
Hepatoblastoma | Liver |
Neuroblastoma | Nerve tissue, often in the adrenal glands |
Retinoblastoma | The eye |
Rhabdomyosarcoma | Muscle and soft tissue |
Wilms tumor | Kidney |
What Are the Symptoms of Childhood Cancer?
Childhood cancer symptoms can look a lot like symptoms of common childhood illnesses. After all, most kids experience headaches, stomachaches, and bumps and bruises that do not mean cancer. Still, any symptom that lasts or gets worse is something you should discuss with your child's healthcare provider.
Medical experts use the acronym CHILDCANCER to list potential childhood cancer warning signs:
Letter | Warning Sign |
|---|---|
C | Continued, unexplained weight loss |
H | Headaches, often with early-morning vomiting |
I | Increased swelling or persistent pain in bones, joints, back, or legs |
L | Lump or mass, especially in the neck, chest, armpits, belly, or pelvis |
D | Excessive bruising, bleeding, or a rash that develops |
C | Constant, frequent, or persistent infections |
A | A whitish color behind the pupil of the eye |
N | Nausea that persists, or vomiting without nausea |
C | Constant tiredness (fatigue) or noticeable paleness (pallor) |
E | Eye or vision changes that occur suddenly and persist |
R | Recurring or persistent fevers not linked to the flu or common illnesses |
The key idea: ordinary aches and bumps are normal in childhood. What matters is the pattern — symptoms that linger, return, or worsen are worth a medical conversation, not a panic.
What Causes Childhood Cancer?
Cancer happens when genes change (mutate) and create abnormal cells. These abnormal cancer cells make more copies that crowd out healthy cells. Without treatment, the cancer can spread — which is called metastatic cancer.
The cause in children is different from the cause in adults. In adults, genetic mutations usually happen with age and long-term exposure to carcinogens — cancer-causing agents like tobacco, ultraviolet light from the sun, or workplace chemicals. That is not typically the case with childhood cancer. Instead, mutations arise for reasons researchers are still trying to figure out, and they may happen before or after a child is born.
Cancer research has allowed healthcare providers to identify mutations in some childhood cancers. These mutations are usually different from those found in the adult versions of the same cancers, and that information may help a child's provider choose the most effective treatment plan.
What Increases a Child's Risk?
Doctors do know that some inherited (genetic) disorders increase cancer risk. In the U.S., approximately 8 to 10 out of every 100 children with cancer have an associated genetic disorder.
Genetic Disorder | Brief Description |
|---|---|
Beckwith-Wiedemann syndrome | A growth disorder present at birth |
Familial adenomatous polyposis (FAP) | Causes many polyps in the digestive tract |
Fanconi anemia (FA) | A condition affecting bone marrow function |
Li-Fraumeni syndrome | Raises risk of several cancer types |
Noonan syndrome | A genetic condition affecting growth and development |
Von Hippel-Lindau disease | Causes tumors in multiple organs |
It is important to remember that not every child with these disorders develops cancer. But if a child has one of these conditions, their provider may recommend cancer screenings that detect cancer signs early.
How Is Childhood Cancer Diagnosed?
Healthcare providers use several tests together to diagnose cancer and to plan treatment.
Test | What It Checks |
|---|---|
Blood tests | Irregularities in blood cells that may signal cancer |
Imaging tests | CT scans, MRIs, PET scans, and ultrasounds that show organs and tissue |
Biopsy | A sample of fluid or tissue examined under a microscope by a pathologist |
Bone marrow biopsy / aspiration | A sample of bone marrow, where blood cells are made, checked for cancer |
Lumbar puncture | Cerebrospinal fluid (CSF) — the clear fluid surrounding the spine and brain — checked for cancer cells or tumor markers |
Genetic tests | Mutations associated with specific childhood cancers, which may guide treatment choice |
A pathologist is a doctor who studies tissue under a microscope to look for cancer cells. Tumor markers are substances found in blood, urine, or tissue that can point to cancer. Together, these tests tell the care team exactly what kind of cancer they are treating.
How Is Childhood Cancer Treated?
Childhood cancer treatment is usually a team effort combining several approaches.
Treatment | How It Works |
|---|---|
Chemotherapy | The most common childhood cancer treatment. Drugs kill cancer cells, given in cycles — treatment days followed by recovery days |
Radiation therapy | A machine delivers radiation that shrinks or destroys tumors, or an implanted device delivers radiation directly to a tumor |
Stem cell transplant | An option for leukemia or lymphoma. High-dose chemotherapy first, then an infusion of healthy blood-forming cells from a donor |
Surgery | Sometimes surgeons remove solid tumors completely; sometimes surgery is combined with other treatments |
Immunotherapy | Helps the child's immune system fight cancer better |
Targeted therapy | Attacks cancer-cell weaknesses tied to specific gene mutations |
Immunotherapy and targeted therapy are newer treatments and may only be available through a clinical trial — a research study that tests how well new treatments work. A child's provider may recommend joining a trial if other treatments have not helped enough, sometimes alongside standard treatment. The goal is to give every child the best chance at the best care.
When Should Parents Seek Care?
Two situations should always prompt a call to your child's healthcare team. First, if treatment side effects are more intense than expected. Second, if a child who is in remission — showing no signs or symptoms of cancer — develops symptoms that could mean the cancer is coming back.
Rarely, cancer symptoms or treatment side effects are medical emergencies. The child's provider will explain which symptoms need immediate care. If a child shows any sudden, severe distress — trouble breathing, extreme weakness, or loss of consciousness — seek emergency care right away.
What Is the Outlook for a Child With Cancer?
The news is hopeful. More than 8 out of 10 children with cancer in high-income countries with easy access to care are cured, based on the five-year survival rates for the most common childhood cancers. The term "cure" may also apply when childhood cancer goes into remission. For example, 9 out of 10 children with acute lymphoblastic leukemia attain remission — meaning no more signs or symptoms of cancer.
It is important to remember that survival rates are estimates. They do not reflect the unique factors that will impact an individual child's experience. That is why it is important to talk to your child's healthcare provider about the child's prognosis — the likely future outcome — so they can put the numbers into perspective.
What About Life After Cancer?
While childhood cancer is often curable, the impact of the disease may affect a child's long-term health. According to recent research, survivors of childhood cancer may have shorter lifespans than their peers and are more likely to experience health issues in adulthood, including heart problems, hormone-related conditions, and secondary cancers.
Not everyone's risk is the same — it depends on the diagnosis and the treatment. Stem cell transplants often cause late effects, for example, while treatment with surgery and low-dose chemotherapy is less likely to cause future issues.
Regardless, all childhood cancer survivors need long-term follow-up care, including regular tests to detect signs of late treatment effects.
How Can Parents Help Their Child?
Experts recommend being open and honest when talking to your child about cancer. These will be tough conversations, but children with cancer benefit from knowing what is wrong and what is being done to help them. Older children and teenagers typically understand straightforward explanations. If your child is young, ask a child life specialist — a professional trained to help children understand and cope with medical experiences — for ideas on how to talk about cancer with them.
As your child's caregiver, be their full-time advocate. You know your child best. Take cues from them and be the support they need every step of the way.
Every year, thousands of parents and caregivers hear the words, "Your child has cancer." Increasingly, they also hear, "We can treat your child's cancer, and we may be able to cure it." Thanks to newer treatments, more young children and teens are surviving cancer. That said, survivorship is another step on a lifelong care journey, and the care team will advise on the care a child needs during and after treatment.
What is the bottom line on childhood cancer?
Childhood cancer is uncommon — about 15,000 U.S. children are diagnosed each year — but it is highly treatable, and more than 8 in 10 children in countries with easy access to care are cured. Symptoms often mimic ordinary childhood illnesses, so the rule of thumb is simple: if a symptom lasts or gets worse, bring it to your child's provider. Modern treatment combines chemotherapy, radiation, surgery, and newer therapies, and the research keeps improving. For families walking this path, honest communication, a strong care team, and lifelong follow-up care give children the best chance at a full, healthy life.
Find expert guidance on your family's health questions at [Rinnit.com](https://www.rinnit.com).
Frequently Asked Questions
What age range counts as childhood cancer?
Childhood cancer covers children ages 0 to 19. It includes pediatric cancers (infants through age 14) and adolescent cancers (ages 15 to 19).
How many children get cancer each year in the U.S.?
Approximately 15,000 children in the U.S. are diagnosed with cancer each year. Childhood cancers are uncommon, but they can be treated and often cured.
What is the most common childhood cancer?
Leukemia is the most common type of childhood cancer. It starts in the bone marrow, where blood cells are made. Acute lymphoblastic leukemia (ALL) is the most common childhood cancer diagnosis.
Is childhood cancer curable?
Yes, often. More than 8 out of 10 children with cancer in high-income countries with easy access to care are cured, based on five-year survival rates for the most common childhood cancers.
What does "in remission" mean?
Remission means there are no more signs or symptoms of cancer. The term "cure" may apply when cancer goes into remission. For example, 9 out of 10 children with ALL attain remission.
What are the main types of childhood cancer?
There are three groups: leukemias and lymphomas (blood cancers), brain and spinal cord tumors, and solid tumors such as osteosarcoma, Wilms tumor, neuroblastoma, and retinoblastoma.
What early signs of childhood cancer should parents watch for?
The acronym CHILDCANCER covers the main warning signs: continued weight loss, morning-vomiting headaches, bone or joint pain, lumps, unexplained bruising or bleeding, persistent infections, a white spot behind the pupil, persistent nausea, fatigue or paleness, sudden vision changes, and recurring fevers.
Do childhood cancer symptoms look like normal childhood illnesses?
Yes, they can. Most kids get headaches, stomachaches, and bruises that do not mean cancer. The key is that any symptom that lasts or gets worse should be discussed with your child's healthcare provider.
What causes childhood cancer?
Cancer happens when genes mutate and create abnormal cells that crowd out healthy cells. Unlike adult cancers, childhood cancer mutations usually are not tied to age or exposure to carcinogens like tobacco or UV light. Researchers are still working to understand why they happen.
Can childhood cancer be inherited?
Some inherited genetic disorders raise the risk. In the U.S., about 8 to 10 out of every 100 children with cancer have an associated genetic disorder, such as Beckwith-Wiedemann syndrome, Fanconi anemia, or Li-Fraumeni syndrome. But not every child with these disorders develops cancer.
How is childhood cancer diagnosed?
Providers use blood tests, imaging (CT, MRI, PET, ultrasound), biopsy, bone marrow testing, lumbar puncture, and genetic tests. Together these identify the cancer type and guide treatment.
What is a lumbar puncture and why is it needed?
A lumbar puncture checks cerebrospinal fluid — the clear fluid surrounding the spine and brain — for cancer cells or tumor markers.
What is the most common treatment for childhood cancer?
Chemotherapy is the most common childhood cancer treatment. It uses drugs to kill cancer cells and is given in cycles of treatment days and recovery days.
Can my child get newer treatments like immunotherapy?
Immunotherapy and targeted therapy are newer options that may only be available through a clinical trial. A provider may recommend joining a trial if standard treatments have not helped enough.
What is a stem cell transplant?
For some leukemias and lymphomas, providers first use high-dose chemotherapy to kill cancer cells, then infuse healthy blood-forming cells from a donor to rebuild the blood system.
Do cancer survivors face health risks later in life?
Yes. Survivors may have shorter lifespans than their peers and are more likely to face heart problems, hormone-related conditions, and secondary cancers in adulthood. Risk depends on the diagnosis and treatment — stem cell transplants often cause late effects, while surgery plus low-dose chemo is less likely to.
Do childhood cancer survivors need ongoing care?
All childhood cancer survivors need long-term follow-up care, with regular tests to detect signs of late treatment effects.
How should I talk to my child about their cancer?
Experts recommend being open and honest. Children benefit from knowing what is wrong and what is being done to help them. For young children, a child life specialist can offer ideas on how to explain cancer.
Are survival rates the same for every child?
No. Survival rates are estimates and do not reflect the unique factors that will impact an individual child's experience. A child's provider can explain their specific prognosis.
When should I call my child's care team right away?
Call if treatment side effects are more intense than expected, or if a child in remission shows symptoms that could mean the cancer is returning. Rarely, symptoms are emergencies needing immediate care — your provider will explain which signs those are.
Who can help me support my child through treatment?
Be your child's full-time advocate — you know your child best. Lean on the care team, ask for a child life specialist, and follow your child's cues.
Related Reading
References
Armstrong GT, Chen Y, Yasui Y, et al. Reduction in late mortality among 5-year survivors of childhood cancer. N Engl J Med. 2016;374(9):833-842. PMID 26761625. https://doi.org/10.1056/NEJMoa1510795
Bhatia S, Tonorezos ES, Landier W. Clinical care for people who survive childhood cancer: a review. JAMA. 2023;330(12):1175-1186. PMID 37750876. https://doi.org/10.1001/jama.2023.16875
Charrier T, Haddy N, Fresneau B, et al. Life years lost by childhood cancer treatment and health related late effects among childhood cancer survivors. Cancer Epidemiol. 2024;93:102692. PMID 39514959. https://doi.org/10.1016/j.canep.2024.102692
Ehrhardt MJ, Leerink JM, Mulder RL, et al. Systematic review and updated recommendations for cardiomyopathy surveillance for survivors of childhood, adolescent, and young adult cancer from the International Late Effects of Childhood Cancer Guideline Harmonization Group. Lancet Oncol. 2023;24(3):e108-e120. PMID 37052966. https://doi.org/10.1016/S1470-2045(23)00012-8
Cleveland Clinic. Childhood Cancer. Medically reviewed; last updated 03/24/2025. Accessed October 13, 2026. https://my.clevelandclinic.org/health/diseases/24960-childhood-cancer
National Cancer Institute, Surveillance, Epidemiology, and End Results (SEER) Program. Cancer Stat Facts (updated annually). Accessed October 13, 2026. https://seer.cancer.gov/statfacts/
PDQ Pediatric Treatment Editorial Board. Childhood Cancer Genomics (PDQ®)–Health Professional Version. National Cancer Institute. Updated April 30, 2025. https://www.cancer.gov/types/childhood-cancers/pediatric-genomics-hp-pdq
Medical disclaimer
This article is for general informational purposes only and does not constitute medical advice, diagnosis, or treatment. Always seek the guidance of your physician or other qualified health provider with any questions about a medical condition. Never disregard professional medical advice or delay seeking care because of something you read here. If you or your child are in immediate danger — such as trouble breathing, severe bleeding, or sudden loss of consciousness — call your local emergency number (in the U.S., dial 911) or go to the nearest emergency room right away.
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