Survival Rates for Ewing Tumors

Survival rates can give you an idea of what percentage of people with the same type and stage of cancer are still alive a certain amount of time (usually 5 years) after they were diagnosed. They can’t tell you how long a person will live, but they may help give you a better understanding of how likely it is that treatment will be successful.

Keep in mind that survival rates are estimates and are often based on previous outcomes of large numbers of people who had a specific cancer, but they can’t predict what will happen in any particular person’s case. These statistics can be confusing and may lead you to have more questions. Ask your doctor how these numbers might apply to your (child's) situation.

What is a 5-year relative survival rate?

A relative survival rate compares people with the same type and stage of cancer to people in the overall population. For example, if the 5-year relative survival rate for a specific stage of Ewing tumor is 80%, it means that people who have that cancer are, on average, about 80% as likely as people who don’t have that cancer to live for at least 5 years after being diagnosed.

Where do these numbers come from?

The American Cancer Society relies on information from the Surveillance, Epidemiology, and End Results (SEER) database, maintained by the National Cancer Institute (NCI), to provide survival statistics for different types of cancer.

The SEER database tracks 5-year relative survival rates for Ewing tumors (Ewing sarcomas) in the United States, based on how far the cancer has spread. The SEER database, however, does not group cancers by AJCC TNM stages. Instead, it groups cancers into localized, regional, and distant stages:

• Localized: There is no sign that the cancer has spread outside the bone (or other area) where it started.
• Regional: The cancer has spread outside the bone (or other area) and into nearby structures, or it has reached nearby lymph nodes.
• Distant: The cancer has spread to distant parts of the body, such as to the lungs or to bones in other parts of the body.

5-year relative survival rates for Ewing tumors

These numbers are based on people diagnosed with Ewing tumors between 2012 and 2018.

SEER* stage	5-year relative survival rate
Localized	82%
Regional	71%
Distant	39%
All SEER stages combined	63%

*SEER = Surveillance, Epidemiology, and End Results

Understanding the numbers

• These numbers apply only to the stage of the cancer when it is first diagnosed. They do not apply later on if the cancer grows, spreads, or comes back after treatment.
• These numbers don’t take everything into account. Survival rates are grouped based on how far the cancer has spread. But other factors, such as those listed below, can also affect a person’s outlook.
• People now being diagnosed with Ewing tumors may have a better outlook than these numbers show. Treatments improve over time, and these numbers are based on people who were diagnosed and treated at least 5 years earlier.

Other factors that can affect prognosis (outlook)

Factors other than the stage of the cancer can also affect survival rates. Factors that have been linked with a better prognosis include:

• Smaller tumor size
• Main tumor is on an arm or leg (as opposed to chest wall or pelvis)
• Normal blood LDH level
• Good tumor response to chemotherapy
• Age younger than 10 years

Even when taking these other factors into account, survival rates are at best rough estimates. Your cancer care team is your best source of information on this topic.