Radiotherapy, a powerful tool in oncology, has a lesser-known yet significant role in treating non-malignant conditions. But what if this treatment could be a game-changer for benign diseases?
In these cases, ionising radiation is not used to destroy tumors but to regulate biological processes like inflammation, abnormal blood vessel growth, and excessive tissue responses. This approach is particularly useful for conditions like arteriovenous malformations, trigeminal neuralgia, and certain benign gynecological and dermatological issues. And here's where it gets intriguing: it's even being explored for refractory cardiac arrhythmias.
The strategy for benign diseases differs from cancer treatment. Lower doses and different fractionation schemes are employed to control symptoms and improve function while minimizing long-term side effects. This is crucial, as these treatments are often considered when conventional methods have failed or are too risky.
The science behind it is fascinating: low to moderate radiation doses can inhibit fibroblast proliferation, reduce inflammation, and promote tissue remodeling. This is why radiotherapy is being used in conditions like keloids and Dupuytren disease, aiming to prevent excessive tissue reactions.
Musculoskeletal Diseases
A study by Kim et al. (ASTRO 2025) suggests that low-dose radiation therapy may be a safe and effective option for knee osteoarthritis (OA) patients who are not surgical candidates. In a randomized trial, 70% of patients receiving 3 Gy showed significant improvement in pain and function, with minimal side effects.
Martin et al. (ASTRO 2025) investigated low-dose radiotherapy for early Dupuytren's disease (DD). The study found it to be well-tolerated, with mostly mild side effects and no negative impact on quality of life. This could be a promising preventative approach for DD.
Karimi et al. (2024) retrospectively analyzed low-dose radiotherapy for heel spurs, showing marked symptom improvement in 70% of patients. This safe and effective treatment may have broader applications in orthopedic practice.
Neurological Diseases
de Haan et al. (2025) reviewed stereotactic radiotherapy (SRT) for Parkinson's disease tremor, finding substantial tremor reduction and low toxicity. However, standardized reporting is needed to fully understand its long-term benefits.
Ortholan et al. (2023) compared two radiosurgery techniques for trigeminal neuralgia, highlighting the importance of dose constraints. While a 6-mm shot improved pain control, it also increased nerve dysfunction, emphasizing the delicate balance in treatment planning.
Skin Diseases
Tsai-Ling Tsai et al. (2025) reported excellent local control and cosmetic outcomes using postoperative brachytherapy for keloids. This highly effective treatment had minimal side effects, making it a promising option for keloid management.
Goutos and Ogawa (2017) reviewed the evolution of brachytherapy for keloid scars, emphasizing its growing popularity. However, they stress the need for controlled trials and patient education about long-term risks, including secondary cancer risks.
Radiotherapy's potential in non-malignant conditions is undeniable, but it also raises questions. How can we ensure patients understand the risks and benefits? Are there conditions where this approach might be overkill? As we explore these applications, what are your thoughts on balancing innovation with patient safety?
