Radiation Therapy
for Arthritis
A low-dose, non-surgical option for relieving chronic joint pain and inflammation in patients with arthritis who have not responded to conventional treatments.
What is radiation therapy for arthritis?
Radiation therapy for arthritis, sometimes called low-dose radiotherapy (LDRT) (or radiosynoviorthesis), uses carefully controlled doses of ionizing radiation to reduce inflammation in affected joints. Unlike the high doses used in cancer treatment, the radiation applied for arthritis is extremely low and targets the synovial tissue, which is the lining of the joint responsible for chronic inflammation and pain.
This approach has been used in Europe for decades and is gaining renewed attention in the United States as research continues to demonstrate its effectiveness for patients with persistent, treatment-resistant joint pain. It is considered when other therapies have provided insufficient relief.
Which types of arthritis can radiation therapy treat?
Low-dose radiation therapy has been studied and applied across several forms of arthritis and related inflammatory joint conditions. Your care team will assess your diagnosis, symptom severity, and prior treatment history to determine whether this approach is appropriate. Conditions commonly treated include:
- Osteoarthritis affecting the hands, knees, hips, or shoulder joints
- Rheumatoid arthritis with persistent synovitis in specific joints
- Psoriatic arthritis with localized joint involvement
- Ankylosing spondylitis with painful enthesitis at tendon and ligament attachment sites
- Calcific tendinitis, particularly of the shoulder
- Heel spurs and plantar fasciitis that have not responded to physical therapy or injections
Who is a good candidate for this treatment?
Radiation therapy for arthritis is typically considered for patients with moderate to severe joint pain that has persisted despite conventional therapies. A multidisciplinary evaluation, often involving your rheumatologist and a radiation oncologist, helps determine whether you are an appropriate candidate. You may be a good candidate if you:
- Have documented arthritis or inflammatory joint disease confirmed by imaging or clinical evaluation
- Have not achieved adequate relief from NSAIDs, corticosteroid injections, or physical therapy
- Are not a suitable candidate for or wish to delay joint replacement surgery
- Have localized joint symptoms rather than diffuse, whole-body disease activity
- Are not pregnant and do not have active infection at the treatment site
What does a treatment session involve?
External beam low-dose radiation therapy for arthritis is non-invasive, painless, and does not require anesthesia or hospitalization. Here is what a typical course looks like:
- A simulation appointment is scheduled to map the target joint using imaging, allowing the team to plan the precise radiation field.
- Custom positioning aids may be created to ensure consistent, accurate delivery at each visit.
- Each treatment fraction takes approximately 10 to 20 minutes from arrival to departure, with the actual radiation delivery lasting only a few minutes.
- You lie still on the treatment table while the linear accelerator delivers radiation from several angles to the joint.
- You feel nothing during the treatment itself and can drive yourself to and from appointments.
- Sessions are typically scheduled three times a week for 2 weeks completing a course of 6 fractions.
What to expect after treatment
Pain relief from low-dose radiation therapy often develops gradually over 6 to 12 weeks following the completion of treatment. Some patients experience a brief, temporary increase in joint discomfort in the first few days after starting therapy, which resolves on its own.
Is low-dose radiation therapy safe?
The doses used for arthritis treatment are far below those associated with radiation-related risks. A full course of LDRT for arthritis delivers a total dose in the range of 3 to 6 Gy (Gray), compared to 50 to 70 Gy typically used in cancer therapy. At these levels, the risk of radiation-induced complications is considered extremely low.
Long-term safety considerations
No significant increase in secondary cancer risk at doses used for arthritis
Repeat treatments are possible with appropriate intervals between courses
Special caution is applied for patients under age 40 due to longer life exposure timeframe
Avoided in pregnancy or in patients with certain connective tissue disorders
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Continuing care after treatment
Follow-up after a course of radiation therapy is important for monitoring your response and coordinating ongoing joint care. Your plan will typically include:
- A follow-up visit with your radiation oncologist at 4 to 12 weeks to assess pain response and document outcomes
- Continued management with your rheumatologist or primary care physician for disease-modifying therapy if applicable
- Physical therapy or occupational therapy to optimize joint function as pain decreases
Patients who respond well to an initial course and later experience recurrence of symptoms may be candidates for a repeat treatment series after an appropriate interval, typically at least 12 months.
Schedule an Appointment with Unio Specialty Care Today! Our team is ready to help you find lasting relief. Contact us to get started.