Common Pediatric Cancers and Their Treatments

• Although pediatric cancers are uncommon, they continue to be among the leading causes of disease-related mortality in children.
• Leukemia and brain tumors constitute a substantial share of childhood cancer cases.
• Over the past decade, advances in multimodal treatment strategies have significantly improved survival outcomes.
• Ongoing clinical trials continue to improve treatment strategies and reduce long-term side effects.

Common Pediatric Cancers and Their Types

Common pediatric cancers encompass a group of malignancies that occur primarily during infancy, childhood, and early adolescence. These cancers differ from adult-onset malignancies in their molecular profiles, patterns of spread, and response to therapy. Pediatric cancers are often more responsive to treatment, but they also require careful long-term follow-up due to potential late effects of therapy on growth and development. In addition to the most frequently diagnosed malignancies, rare pediatric cancers also contribute to the overall disease burden and present unique diagnostic and treatment challenges. The most common types of pediatric cancers include:

Leukemia

Leukemia originates in the bone marrow and blood-forming tissues and accounts for the largest proportion of childhood cancer diagnoses. The most common childhood cancer is acute lymphoblastic leukemia (ALL), which arises from immature lymphoid cells and typically presents with symptoms such as fatigue, recurrent infections, and unexplained bruising. Advances in risk-adapted therapy have significantly improved outcomes for this disease.

Brain and Central Nervous System Tumors

Brain and central nervous system tumors represent the second most frequently diagnosed cancer type in children. Most common childhood brain cancer includes low-grade gliomas, which often demonstrate slow growth but may still cause significant neurological symptoms depending on their location. In addition to these more frequently observed tumor types, rare childhood brain cancer accounts for a smaller but clinically important subset of cases, often requiring specialized diagnostic approaches and individualized treatment strategies. Treatment strategies balance tumor control with preservation of cognitive and neurological function.

Lymphomas

Lymphomas originate in the lymphatic system and are generally classified as Hodgkin or non-Hodgkin types. These cancers are more frequently diagnosed in older children and adolescents and usually present with painless lymph node enlargement, fever, or weight loss. With modern combination therapies, the prognosis is generally favorable.

Bone Cancers

Primary bone cancers are relatively rare in children, but are clinically significant due to their aggressive nature. Most common pediatric bone cancer is osteosarcoma, which usually arises in long bones during periods of rapid growth. Standard treatment consists of combined chemotherapy and surgical intervention.

Other Solid Tumors

Additional solid tumors such as neuroblastoma, Wilms tumor, and rhabdomyosarcoma contribute to the spectrum of pediatric malignancies. Therefore, the most common types of pediatric cancers include both hematological and solid tumors, each requiring disease-specific treatment protocols. Neuroblastoma is the most common extracranial solid tumor in children, particularly in infants and very young children.

Incidence and Trends in Most Common Childhood Cancer

Incidence of childhood cancer remains low compared to adult cancer populations, accounting for approximately 1% of all new cancer diagnoses worldwide. Nevertheless, childhood cancer remains a major public health concern because of its effects on survival outcomes, long-term health, and overall quality of life. Childhood cancer incidence trends show a slight increase over recent decades, which is largely attributed to improvements in diagnostic imaging, cancer registration, and reporting accuracy rather than a definitive rise in disease occurrence.

Epidemiological studies indicate that most common types of childhood cancer vary modestly by geographic region and socioeconomic status. Additionally, most common age for childhood cancer diagnosis is between two and five years, reflecting the developmental origins of many pediatric malignancies.

Clinical Outcomes and Long-Term Outlook in Most Common Pediatric Cancers

Thanks to advances in chemotherapy, radiotherapy, surgical techniques and supportive care, survival outcomes for pediatric cancer have improved significantly over the past 50 years. Outcomes are influenced by the cancer type, stage at diagnosis, molecular features, and the individual response to therapy. Outcomes are generally favorable, but some subtypes are associated with lower survival rates and a risk of late complications. Estimated 5-year survival rates (overall survival) for selected pediatric cancers:

Pediatric cancer type	Estimated 5-year survival rate
ALL (Acute lymphoblastic leukemia)	85–90%
AML (Acute myeloid leukemia)	60–70%
Brain tumor	62–80%
Neuroblastoma	64–88%
Rhabdomyosarcoma	46–64%
Wilms tumor	92%
Osteosarcoma	67%
Ewing sarcoma	49–76%

*Source: Ju, H. Y., Hong, C. R., & Shin, H. Y. (2014). Advancements in the treatment of pediatric acute leukemia and brain tumor-continuous efforts for 100% cure. Korean Journal of Pediatrics, 57(10), 434.

Treatment Options in Pediatric Cancers

Treatment of pediatric cancer relies on a multidisciplinary strategy customized to the cancer type, stage of disease, and individual patient factors. Treatment strategies are designed to maximize disease control while minimizing short-term toxicity and long-term effects on growth and development. Advances in pediatric oncology have significantly improved treatment outcomes in recent decades.

Chemotherapy

Chemotherapy is a cornerstone of pediatric cancer treatment and is typically administered in carefully timed combinations to maximize tumor control while minimizing toxicity. Drug selection and dosage are determined by cancer subtype and patient-specific factors.

Surgery

Surgical intervention plays a critical role in the treatment of many solid tumors. The main objective is the total excision of the tumor while maintaining organ function and reducing the risk of long-term complications.

Radiation

Radiation therapy is used selectively in pediatric oncology due to its potential impact on developing tissues. When clinically appropriate, advanced techniques are used to reduce radiation exposure to surrounding healthy tissue.

Supportive and Complementary Approaches

In some cases, supportive measures or alternative therapies for pediatric cancer may be discussed to help manage symptoms or treatment-related side effects. These approaches are used to complement standard medical care, not to replace it, and should always be supervised by qualified healthcare professionals.

Living With Most Common Childhood Cancer

Living with pediatric cancer involves addressing both medical and psychosocial challenges that extend beyond the active treatment phase. Long-term follow-up care is critical for monitoring treatment effects and supporting healthy development, and this process is most effective when comprehensive support systems are in place. Key areas of support commonly include:

• Ongoing medical monitoring to identify late effects of treatment and manage chronic health conditions.
• Support services focused on the psychological and emotional well-being of pediatric patients and their family members.
• Educational accommodations to support learning and cognitive development during and after treatment.

Through the integration of these supportive measures, families often benefit from multidisciplinary care models that promote emotional well-being, educational continuity, and successful social integration throughout survivorship.

FAQs About the Most Common Childhood Cancers

How common is childhood cancer?

Childhood cancer is relatively rare compared to cancers diagnosed in adults, accounting for approximately 1% of all cancer diagnoses worldwide. Despite being relatively rare, childhood cancer represents an important public health concern. In many countries, particularly in high-income regions where deaths from infectious diseases have declined, childhood cancer remains one of the leading causes of disease-related deaths in children.

How rare is childhood cancer?

Childhood cancer is classified as a rare disease, with 15 to 20 new cases per 100,000 children each year. This low incidence means that individual healthcare providers may encounter relatively few cases, highlighting the importance of specialized and centralized pediatric oncology centres.

What is the most common childhood cancer?

Acute lymphoblastic leukemia (ALL) is the most frequently diagnosed cancer in children worldwide and represents a substantial share of pediatric malignancies. ALL mainly involves the bone marrow and peripheral blood, resulting in excessive production of immature white blood cells, and is most frequently diagnosed in children aged two to five years.

Sources:

Cancer in Children – World Health Organization

US Childhood Cancer Statics – American Childhood Cancer Organization

Prognostic Factors and Survival Rates for Childhood Leukemia – American Cancer Society