Radiation therapy is the medical use of ionizing radiation as part of cancer treatment to control neoplastic cells. Radiotherapy may be used for curative or adjuvant cancer treatment. It is used as palliative/therapeutic treatment. Radiotherapy has several applications in non-malignant conditions, such as the treatment of Trigeminal neuralgia, severe eye diseases, pterygium, pigmented villonodular synovitis, prevention of keloid scar growth, and prevention of heterotopic ossification, thyroid and other diseases. The use of radiotherapy in non-malignant conditions is limited partly due to risk of radiation-induced cancers.
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