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Atypical teratoid rhabdoid tumors (ATRTs) are rare, highly aggressive central nervous system tumors that primarily affect infants and young children. According to Tadanori Tomita et al. (2025), ATRTs account for approximately 1.6% of all pediatric central nervous system tumors, with about 90% occurring in children younger than three years. As per atypical teratoid rhabdoid tumors epidemiology forecast by Expert Market Research, the disease burden is expected to evolve with improving diagnosis and treatment advancements.
Base Year
Historical Period
Forecast Period

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Expert Market Research's “Atypical Teratoid Rhabdoid Tumors Epidemiology Forecast Report 2026-2035” offers comprehensive information on the prevalence and demographics of atypical teratoid rhabdoid tumors. It projects the future incidence and prevalence rates of atypical teratoid rhabdoid tumors cases across various populations. The study covers age, gender, and type as major determinants of the atypical teratoid rhabdoid tumors population. The report highlights patterns in the prevalence of atypical teratoid rhabdoid tumors over time and projects future trends based on multiple variables.
The report provides a comprehensive overview of the disease, as well as historical and projected data on the epidemiology of atypical teratoid rhabdoid tumors in the 8 major markets.
Regions Covered
Atypical teratoid rhabdoid tumors (ATRTs) are rare, highly aggressive central nervous system tumors that primarily affect infants and young children, although they can occur at any age. These tumors develop due to alterations in the SMARCB1 (INI1) gene or, less commonly, the SMARCA4 gene, resulting in uncontrolled cell growth within the brain or spinal cord. ATRTs are classified according to their molecular subgroups, including ATRT-TYR, ATRT-SHH, and ATRT-MYC, each demonstrating distinct biological characteristics and clinical behavior. Early diagnosis is challenging because symptoms often resemble those of other pediatric brain tumors, delaying timely intervention.
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Parameter |
Insight |
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Largest Patient Pool |
United States |
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Fastest Growing Region |
India |
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High-Risk Population |
Infants and young children, particularly those under 3 years of age |
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Key Diagnostic Method |
Magnetic Resonance Imaging (MRI) with histopathological and molecular confirmation |
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Major Risk Factor |
Genetic alterations involving SMARCB1 (INI1) or SMARCA4 genes |
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Major gap in the market |
Limited availability of targeted therapies and delayed diagnosis due to disease rarity |
The atypical teratoid rhabdoid tumors epidemiology division offers information on the patient pool from history to the present as well as the projected trend for each of the 8 major markets. Expert Market Research provides both current and predicted trends for the atypical teratoid rhabdoid tumors epidemiology scenario by examining a wide range of studies. Additionally, the report covers the diagnosed patient pool for atypical teratoid rhabdoid tumors and their trends. The data is broken down into specific categories, such as total prevalent cases in males and females, and total diagnosed cases across different age groups and patient pools.
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Epidemiology Segment |
Key Insights |
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Diagnosed Prevalent Cases of the Disease |
According to Tadanori Tomita et al. (2025), atypical teratoid rhabdoid tumors account for approximately 1.6% of all pediatric central nervous system tumors. As reported by Rosalinda Calandrelli et al. (2023), they represent 1–3% of all primary central nervous system tumors and approximately 6.7% of central nervous system tumors in children younger than three years, emphasizing their rarity and concentration in early childhood. |
|
Gender-Specific Cases of the Disease |
As highlighted by Guoyun Bi et al. (2026), atypical teratoid rhabdoid tumors exhibit a slight male predominance overall. However, according to Kinderkrebsinfo, German registry findings indicate that boys are slightly less affected than girls, with a gender ratio of 0.9:1, demonstrating regional variation in gender distribution. |
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Age-Specific Cases of the Disease |
According to Tadanori Tomita et al. (2025), approximately 90% of atypical teratoid rhabdoid tumors occur in children younger than three years, while 40–50% are diagnosed during the first year of life. As per Rosalinda Calandrelli et al. (2023), the disease is exceptionally rare in adolescents and adults, with fewer than 60 adult cases reported in the medical literature. |
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Ethnicity-Wise Cases of the Disease |
Based on findings from Guoyun Bi et al. (2026), atypical teratoid rhabdoid tumors are enriched among patients with African ancestry, with an odds ratio of 2.6. The study also reported demographic variation in a Chinese pediatric cohort, suggesting potential ancestry-related differences in disease occurrence. |
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Mortality and Survival Analysis of the Disease |
As reported by Zhiliang Wang et al. (2025), atypical teratoid rhabdoid tumors are highly malignant embryonal central nervous system tumors, and prognosis differs across molecular subgroups. The ATRT-MYC subgroup is associated with the poorest outcomes, whereas the ATRT-TYR subgroup generally demonstrates a comparatively more favorable prognosis. |
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Disease Type |
Prevalence |
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ATRT-TYR |
The ATRT-TYR molecular subgroup is more frequently identified in older children and is associated with a relatively better prognosis, reflecting differences in epidemiological distribution among atypical teratoid rhabdoid tumor subtypes. |
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ATRT-SHH |
The ATRT-SHH subgroup commonly arises in the cerebellum or midline structures and demonstrates intermediate clinical outcomes, representing one of the three recognized molecular subgroups of atypical teratoid rhabdoid tumors. |
|
ATRT-MYC |
The ATRT-MYC subgroup predominantly affects infants and is characterized by the most aggressive disease behavior and the poorest prognosis, contributing substantially to the epidemiological burden among very young children. |

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The atypical teratoid rhabdoid tumors epidemiology data and findings for the United States, Germany, Spain, Italy, France, the United Kingdom, Japan, and India are also provided in the epidemiology section.
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Country |
Key Insights |
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United States |
As reported by Dana-Farber Cancer Institute, Inc., approximately 20–25 new cases of malignant rhabdoid tumors are diagnosed each year in the United States. The average age at diagnosis is 15 months, indicating that the disease burden is concentrated among infants and toddlers. |
|
Germany |
According to Kinderkrebsinfo, atypical teratoid rhabdoid tumors account for approximately 0.6% of all childhood and adolescent malignancies in Germany, with an incidence of about 1 per million children. The registry reports 15–22 newly diagnosed cases annually, with approximately 80% occurring in children younger than two years and an average diagnosis age of 1.5 years. |
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France |
Atypical teratoid rhabdoid tumors remain a rare pediatric central nervous system malignancy in France, with the epidemiological burden primarily affecting infants and very young children, consistent with the overall global age distribution observed for this disease. |
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Italy |
The epidemiological pattern in Italy indicates that atypical teratoid rhabdoid tumors predominantly affect pediatric populations, particularly infants and young children, following trends commonly reported in international epidemiological studies. |
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Spain |
In Spain, atypical teratoid rhabdoid tumors contribute to a small proportion of pediatric central nervous system tumors, with epidemiological characteristics generally reflecting the global predominance among children younger than three years. |
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United Kingdom |
As per Maxime Enault et al. (2024), malignant rhabdoid tumors have an estimated incidence of 4 per million children younger than 12 months and 0.6 per million children older than one year in the United Kingdom, with no difference between males and females. Approximately 30% of patients present with metastatic disease at diagnosis. |
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Japan |
The epidemiological profile in Japan indicates that atypical teratoid rhabdoid tumors primarily affect infants and young children, with disease occurrence following patterns generally consistent with those reported across other developed healthcare systems. |
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India |
In India, atypical teratoid rhabdoid tumors represent a rare pediatric central nervous system malignancy, with epidemiological characteristics generally aligning with the global predominance among infants and children younger than three years of age. |
The regional epidemiology landscape for atypical teratoid rhabdoid tumors continues to face challenges due to the disease's rarity, limited patient registries, and inconsistent access to advanced molecular diagnostics across several countries. Significant opportunities exist to expand genomic testing, improve early diagnosis through standardized referral pathways, and strengthen international data-sharing initiatives. Emerging growth areas include the integration of molecular profiling into routine clinical practice, development of targeted therapies, and increased participation in multinational clinical trials, particularly in developing healthcare markets such as India, where diagnostic capabilities and pediatric oncology infrastructure are rapidly improving.
The treatment of atypical teratoid rhabdoid tumors requires a multidisciplinary approach that combines maximal safe surgical resection, intensive chemotherapy, and radiation therapy when appropriate. Treatment strategies are individualized according to the patient's age, tumor location, molecular subtype, and overall health status. High-dose chemotherapy with stem cell rescue is frequently considered for younger patients to delay or reduce radiation exposure. Ongoing research is evaluating targeted therapies, immunotherapies, and molecularly guided treatment approaches to improve survival outcomes while minimizing long-term adverse effects. Advances in precision medicine continue to support the development of more personalized therapeutic strategies.
*While we strive to always give you current and accurate information, the numbers depicted on the website are indicative and may differ from the actual numbers in the main report. At Expert Market Research, we aim to bring you the latest insights and trends in the market. Using our analyses and forecasts, stakeholders can understand the market dynamics, navigate challenges, and capitalize on opportunities to make data-driven strategic decisions.*
Explore our key highlights of the report and gain a concise overview of key findings, trends, and actionable insights that will empower your strategic decisions.
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Report Features |
Details |
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Base Year |
2025 |
|
Historical Period |
2019-2025 |
|
Forecast Period |
2026-2035 |
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Epidemiology Statistics Provided |
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Segmentation Provided |
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Geographies Covered |
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