Prognosis and survival for thymus cancer

If you have thymus cancer, you may have questions about your prognosis. A prognosis is the doctor’s best estimate of how cancer will affect someone and how it will respond to treatment. Prognosis and survival depend on many factors. Only a doctor familiar with your medical history, the type and stage and other features of the cancer, the treatments chosen and the response to treatment can put all of this information together with survival statistics to arrive at a prognosis.

A prognostic factor is an aspect of the cancer or a characteristic of the person (such as their general health) that the doctor will consider when making a prognosis. A predictive factor influences how a cancer will respond to a certain treatment. Prognostic and predictive factors are often discussed together. They both play a part in deciding on a treatment plan and a prognosis.

The following are prognostic and predictive factors for thymus cancer.


Stage is an important prognostic factor for thymus cancer. Early stage thymoma or thymic carcinoma that is only in the thymus or surrounding fat tissue has a better prognosis than later stage cancers that have grown into nearby organs or tissues in the chest or spread to other areas of the body.

Find out more about stages of thymus cancer.


Most thymus cancers are divided into groups using the World Health Organization (WHO) classification system. Type A, type AB and type B1 thymomas usually have a very good prognosis because the tumour cells look like normal thymus cells. Type B2 and type B3 thymomas have a less favourable prognosis because they are made up of abnormal thymus cells.

Thymic carcinomas (also called type C) usually have a poor prognosis because they tend to be aggressive tumours that grow quickly and usually have spread to other parts of the body when they are diagnosed. The cancer cells look very different from normal epithelial cells of the thymus.

Find out more about the classification of thymoma and thymic carcinoma.

Surgery to remove the tumour

Surgery is usually used to treat thymus cancer. Thymus cancer that is completely removed by surgery has a much more favourable prognosis than thymus cancer that is not completely removed or if surgery can’t be done.

Expert review and references

Survival statistics for thymus cancer

Survival statistics for thymoma and thymic carcinoma are very general estimates and must be interpreted very carefully. Because these statistics are based on the experience of groups of people, they cannot be used to predict a particular person’s chances of survival.

Medical disclaimer

The information that the Canadian Cancer Society provides does not replace your relationship with your doctor. The information is for your general use, so be sure to talk to a qualified healthcare professional before making medical decisions or if you have questions about your health.

We do our best to make sure that the information we provide is accurate and reliable but cannot guarantee that it is error-free or complete.

The Canadian Cancer Society is not responsible for the quality of the information or services provided by other organizations and mentioned on, nor do we endorse any service, product, treatment or therapy.

1-888-939-3333 | | © 2024 Canadian Cancer Society