Treatments for thymoma

The following are treatment options for thymoma. Your healthcare team will work with you to develop a treatment plan.

Surgery

Surgery is the main treatment for thymoma. The type of surgery is a total thymectomy, which removes the whole thymus gland. Tissue from around the thymus is removed if the cancer has grown into it.

Surgery is used for stages 1, 2 and 3 of thymoma. It is often the only treatment that is needed for stage 1 thymoma.

Surgery is not usually used for stage 4 thymoma because the cancer has already spread to other parts of the body. It may be done to remove as much of the cancer as possible to help reduce the symptoms caused by the cancer. It may be offered after chemotherapy or chemoradiation to shrink the tumour.

Recurrent thymoma may be treated with surgery if possible.

Find out more about surgery for thymus cancer.

Radiation therapy

Radiation therapy uses high-energy rays or particles to destroy cancer cells. External radiation therapy is the type of radiation therapy used to treat thymoma. It is usually given after surgery (post-operative radiation therapy or PORT).

External radiation therapy is used after surgery for stages 2 and 3 of thymoma.

Stage 4 thymoma is treated with external radiation therapy after chemotherapy or chemoradiation.

Radiation therapy is not used to treat stage 1 thymoma because it has not been found to improve survival.

Find out more about radiation therapy for thymus cancer.

Chemotherapy

Chemotherapy uses drugs to destroy cancer cells.

Chemotherapy or chemoradiation may be offered for stages 3, 4 and recurrent thymoma, if the tumour can’t be removed with surgery.

The most common chemotherapy combinations used are:

  • CAP – cisplatin, doxorubicin and cyclophosphamide
  • cisplatin and etoposide
  • carboplatin and paclitaxel

Other drugs that may be given with chemotherapy are prednisone and octreotide (Sandostatin).

Find out more about chemotherapy and other drugs for thymus cancer.

If you can’t have or don’t want cancer treatment

You may want to consider a type of care to make you feel better without treating the cancer itself. This may be because the cancer treatments don’t work anymore, they’re not likely to improve your condition or they may cause side effects that are hard to cope with. There may also be other reasons why you can’t have or don’t want cancer treatment.

Talk to your healthcare team. They can help you choose care and treatment for advanced cancer.

Clinical trials

Talk to your doctor about clinical trials open to people with thymoma in Canada. Clinical trials look at new ways to prevent, find and treat cancer. Find out more about clinical trials.

Expert review and references

  • Donna Maziak, MD, MSc, FRCPC
  • Cabezon-Gutierrez L, Pacheco-Barcia V, Carrasco-Valero F, Palka-Kotlowska M, Custodio-Cabello S, Khosravi-Shahi P. Update on thymic epithelial tumors: a narrative review. Mediastinum. 2024: 8:33.
  • Marx A, Chan JK, Chalabreysse L, Dacic S, Detterbeck F, French CA, et al. The 2021 WHO classification of tumors of the thymus and mediastinum: what is new in thymic epithelial, germ cell and meschymal tumors. Journal of Thoracic Oncology. 2021: 17(2): 200-213.
  • Girard N, Ruffini E, Marx A, Faivre-Finn C, Peters S. Thymic epithelial tumours: ESMO Clinical Practice Guidelines for diagnosis, treatment and follow-up. Annals of Oncology. 2015: Supplement 5:v40-v55.
  • Cameron RB, Girard N, Lee PP. Neoplasms of the mediastinum. DeVita VT Jr, Lawrence TS, Rosenberg S. eds. DeVita Hellman and Rosenberg's Cancer: Principles and Practice of Oncology. 12th ed. Philadelphia, PA: Wolters Kluwer; 2023: Kindle version, [chapter 32], https://read.amazon.ca/?asin=B0BG3DPT4Q&language=en-CA.

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