What is Proton Therapy

Call Now For More Information

General Questions or
Schedule an Appointment


Current Patients


Physician Line


Proton therapy is effective in treating many types of cancers, as well as some non-cancerous tumors and arteriovenous malformations (AVMs), which are tangles of blood vessels that sometimes occur in the brain or spinal cord. Only a doctor can help you determine the best treatment approach for you.

Who benefits most from proton therapy?

Many patients can benefit from proton therapy, including children. The precision of protons may be particularly beneficial for patients whose tumors are near critical organs or structures (such as the brain, bladder, rectum, heart or spinal cord), patients whose cancers have recurred, and patients who can’t tolerate any more X-ray radiation therapy.

Proton therapy can often be used in combination with chemotherapy, as a follow-up treatment to surgery and in combination with standard X-ray radiation. You should discuss combination therapy with a radiation oncologist and a medical oncologist to decide the best treatment option.

Cancerous Tumors

Cancerous Tumors

Below is a list of the more common cancers and tumors we treat at Seattle Cancer Care Alliance Proton Therapy Center. If you do not see your tumor listed, please call us at (877) 897-7628. We treat many cancers beyond the ones listed here.

  • Sarcomas
  • Gynecological Cancers
  • Lymphoma
  • Skin Cancers

Childhood Cancers

Childhood Cancers

Finding out your child has cancer is heartbreaking. We’re here to give your child every opportunity to live a healthy, normal life. While this time can be extremely emotional, it’s important to stay as informed as possible about your treatment options. The good news is, advances in treatment methods and technology have significantly improved outcomes. 

Non-Cancerous Tumors

Non-Cancerous Tumors

A cerebral arteriovenous malformation is an abnormal connection between the arteries and veins in the brain that usually forms before birth. The condition occurs when arteries in the brain connect directly to nearby veins without having the normal vessels (capillaries) between them. AVMs can rupture. This allows blood to leak into the brain or surrounding tissues, and reduces blood flow to the brain. Some patients with an AVM also have cerebral aneurysms. Many AVMs are inoperable.

Arteriovenous malformations (AVMs) of the brain can be treated using protons. In treating large and inoperable AVMs, clinical evidence shows protons to be associated with improved outcomes (the “obliteration” of the malformation) and reduced side effects when compared with X-rays.