Atypical teratoid/rhabdoid tumour of the central nervous system is a rare and aggressive type of brain cancer that mainly affects very young children, though it can also occur in older children and adults.

Prognosis and Outlook

Understanding what lies ahead when a child receives a diagnosis of atypical teratoid/rhabdoid tumour can be difficult for families. This is a rare and serious condition, and being informed about the likely course helps families prepare emotionally and practically. The outlook for children with this type of tumour depends on several important factors, and each child’s situation is unique.

Survival rates for atypical teratoid/rhabdoid tumour vary based on the child’s age at diagnosis, how much of the tumour can be removed during surgery, whether the cancer has spread to other parts of the brain or spinal cord, and the specific treatment approach used. The disease has historically carried a generally poor outcome because these tumours grow very quickly and can be difficult to remove completely. However, it is important to know that recent advances in treatment show that this tumour can be curable in some cases.^[12][20]

Statistical information shows that children aged 0 to 14 years have a five-year relative survival rate of approximately 47.8%. For adolescents and young adults aged 15 to 39, the rate is about 41.5%, while adults over 40 have a five-year survival rate of 24.6%.^[7] These numbers represent averages across many patients and cannot predict what will happen for any individual child. Some children do much better than these statistics suggest, especially those who are three years or older at diagnosis, have tumours that have not spread, and can be treated with aggressive surgical removal followed by chemotherapy and radiation therapy.^[7]

The poorest survival outcomes are seen in very young infants and in patients whose disease has already spread to other areas of the brain or spinal cord at the time of diagnosis. In contrast, the highest survival rates occur in children who are at least three years old when diagnosed, whose tumours have not spread, and who receive comprehensive treatment including surgery, chemotherapy, and radiation.^[7]

This type of tumour may shorten a child’s life expectancy due to how quickly it spreads and how difficult it can be to remove completely.^[6] Yet families should remember that not all cases follow this pattern. Medical teams continue to work on improving treatments every day, and support is available throughout the journey for both patients and their caregivers.

Natural Progression Without Treatment

If an atypical teratoid/rhabdoid tumour is left untreated, it follows a rapid and aggressive course. These tumours are classified as grade 4, which means they are malignant (cancerous) and fast-growing.^[2] The cancer cells multiply very quickly, and the tumour can increase in size over a short period of time.

Because these tumours grow so rapidly, symptoms develop quickly and become worse over a period of days or weeks rather than months or years.^[1][10] A child who might initially seem to have a common illness will not get better with time or traditional therapies if the underlying cause is this type of tumour. The symptoms continue to intensify as the tumour grows and takes up more space within the skull.

Without treatment, the tumour often spreads to other areas of the central nervous system. These tumours can be very fast-growing and frequently spread to other locations in the brain, spinal cord, or even elsewhere in the body through the cerebrospinal fluid (the clear liquid that surrounds the brain and spinal cord).^[2] When the tumour spreads, it is described as disseminated or metastatic disease, which significantly worsens the prognosis.

The natural progression includes increasing pressure inside the skull as the tumour grows. This can lead to a condition called hydrocephalus, where fluid builds up in the brain. In infants, this causes the head to grow larger than normal. In older children, it results in severe headaches and vomiting that worsen over time.^[1] The growing tumour can also damage or compress important structures in the brain that control vital functions like breathing, heart rate, movement, balance, and coordination.

Eventually, without intervention, the tumour’s growth and spread would lead to serious complications affecting the brain’s ability to function. This underscores why early diagnosis and prompt treatment are so important for children with this condition.

Possible Complications

Children with atypical teratoid/rhabdoid tumour can experience various complications, both from the disease itself and as a result of treatment. Understanding these potential difficulties helps families know what to watch for and when to seek medical attention.

One of the most common complications is hydrocephalus, which occurs when the tumour blocks the normal flow of cerebrospinal fluid in the brain. This fluid buildup increases pressure inside the skull, causing headaches, vomiting, and lethargy. In infants, parents or caregivers may notice that the baby’s head is becoming larger. In older children, the increased pressure leads to morning headaches that often improve after vomiting, along with persistent nausea.^[1]

The tumour’s location determines many of the complications that can arise. About half of these tumours form in the cerebellum (the part of the brain that controls movement, balance, and posture) or the brain stem (which controls breathing, heart rate, and basic functions like seeing, hearing, walking, and talking).^[10] When tumours grow in these critical areas, they can interfere with essential body functions. Children may develop problems with balance and coordination, difficulty walking, changes in their activity levels, or extreme fatigue.

The spread of cancer to other parts of the central nervous system represents another serious complication. These tumours can spread through cerebrospinal fluid to multiple locations in the brain or down the spinal cord. When this happens, new symptoms may appear depending on where the cancer has spread, and treatment becomes more challenging.^[2]

Some children with atypical teratoid/rhabdoid tumour have an inherited genetic change that puts them at risk for developing additional tumours. Approximately one-third of patients have an underlying germline mutation (a genetic change present from birth) in a gene called SMARCB1, resulting in something called rhabdoid tumour predisposition syndrome. Children with this inherited condition carry a risk of developing multiple tumours, both in the central nervous system and in other parts of the body, such as the kidneys.^[1][12]

Treatment itself can lead to complications. Surgery to remove brain tumours carries risks including bleeding, infection, and potential damage to surrounding brain tissue. Chemotherapy and radiation therapy, while necessary to destroy cancer cells, can cause side effects ranging from fatigue and nausea to longer-term impacts on development and growth, particularly in very young children whose brains are still developing.

Impact on Daily Life

An atypical teratoid/rhabdoid tumour diagnosis profoundly affects every aspect of a child’s and family’s daily life. The rapid onset of symptoms and the intensive treatment required mean that normal routines are quickly disrupted, and families must adapt to a new reality centered around medical care.

Physically, children with this tumour often feel very unwell. The symptoms—which include persistent headaches (usually worse in the morning), nausea and vomiting, extreme tiredness, and difficulty with balance or coordination—make it hard for children to participate in activities they previously enjoyed.^[1] Young children may become unusually sleepy or show changes in their activity levels. They may struggle with tasks that require balance or coordination, such as walking, playing, or even holding objects. Infants might be more irritable and difficult to comfort.

The treatment journey is long and demanding. Surgery to remove as much of the tumour as possible is typically the first step, followed by intensive chemotherapy and, in many cases, radiation therapy.^[6][7] This means multiple hospital stays, frequent medical appointments, and extended periods when the child cannot attend school or daycare. The side effects of treatment—including fatigue, nausea, hair loss, increased risk of infection, and potential developmental impacts—add additional challenges to daily life.

Emotionally, both children and families face significant stress. Children old enough to understand may feel frightened, confused, or frustrated by what is happening to them. Younger children may not comprehend the situation but sense the anxiety of those around them. Parents and caregivers often experience intense worry, fear, and emotional exhaustion as they navigate treatment decisions and care for their ill child while trying to maintain some sense of normalcy for siblings and other family members.

Social connections can become strained. Friends and extended family may not know how to help or what to say. Children miss out on normal social interactions with peers during extended treatment periods. Siblings may feel neglected or scared, needing their own support and reassurance. Parents may have to reduce work hours or take leave, creating financial stress on top of emotional burdens.

Despite these challenges, many families find ways to cope and maintain quality of life during treatment. Child life specialists in hospitals help children process their experiences through play and age-appropriate explanations. Support groups connect families facing similar situations. Schools often work with families to provide education during and after treatment. Finding moments of joy—whether through favourite activities adapted to the child’s energy levels, visits from loved ones, or small celebrations—becomes important for emotional wellbeing.

Support for Family Members

When a child is diagnosed with atypical teratoid/rhabdoid tumour, the entire family is affected. Understanding how family members can support the patient, particularly regarding participation in clinical trials and navigating the medical system, is crucial for the journey ahead.

Clinical trials test new treatments for this rare and aggressive cancer. Because atypical teratoid/rhabdoid tumour is so uncommon—representing only 1 to 2 percent of childhood brain tumours—participating in clinical trials can be particularly important.^[1] Research studies help doctors understand which treatments work best and contribute to improving care for future children with this diagnosis. Recent clinical trial results show that this tumour can be curable, though outcomes remain challenging compared to other childhood brain tumours.^[12]

Family members can help by learning about available clinical trials. The child’s medical team is the best starting point for information about trials that might be appropriate. Doctors can explain what trials are available, what they involve, and whether the child might be eligible. Not every child will be suitable for every trial, as each study has specific requirements regarding the child’s age, tumour characteristics, previous treatments, and overall health.

When considering a clinical trial, families should ask questions to fully understand what participation means. Important topics to discuss include the purpose of the trial, what treatments or procedures would be involved, how the trial treatment differs from standard treatment, potential risks and benefits, how long the trial would last, whether the family would need to travel to a different medical center, and whether the family can leave the trial if they choose. The medical team should provide clear, honest answers to all questions.

Preparing for trial participation involves practical steps. Family members can help gather and organize medical records, as clinical trials require documentation of the child’s diagnosis and medical history. Keeping a folder or digital file with test results, imaging scans, pathology reports, and treatment records makes this process easier. Some trials require a second opinion or review of the tumour tissue by specific laboratories, and having organized records facilitates these requirements.

Emotional support is equally important. A child participating in a clinical trial needs reassurance and comfort from family members. Explaining what will happen in age-appropriate language helps reduce anxiety. Staying positive while being honest about what to expect helps children feel more secure. Having a parent or trusted caregiver present during medical visits and procedures provides emotional stability.

Family members can also assist with the logistical challenges of treatment and trial participation. This includes arranging transportation to appointments, managing the household while the primary caregiver is at the hospital, caring for siblings, communicating with extended family and friends about the child’s condition and needs, and coordinating offers of help from the community.

Siblings need special attention during this difficult time. They may feel scared, confused, jealous of the attention the ill child receives, or worried about their own health. Family members can support siblings by spending individual time with them, answering their questions honestly at an age-appropriate level, maintaining their routines as much as possible, and helping them express their feelings.

Seeking genetic counseling may be recommended for families, as some cases of atypical teratoid/rhabdoid tumour involve inherited genetic changes. A genetic counselor can discuss whether testing is appropriate, what it might reveal, and what implications exist for other family members.^[10] Family members can support this process by attending counseling sessions, understanding test results, and participating in decisions about whether other family members should consider testing.

Finally, connecting with other families who have faced similar experiences provides invaluable support. Support groups, whether in person or online, allow families to share experiences, practical advice, and emotional support with others who truly understand what they are going through.