Sarcomas are a rare type of malignant tumors. They occur anywhere in the body in both adults and children. The most common method of treating soft tissue sarcoma is surgery. Radiation therapy is rarely used separately, more often in addition to surgery. But it can be used for patients to whom surgery is not indicated for health reasons. Or as a palliative treatment - to relieve pain and other symptoms of the disease.

Proton therapy is also most often used in combination with other methods. Such advantages as the accuracy of the proton beam targeting of cancer cells, sparing of surrounding healthy tissues and minimal side effects from irradiation, give grounds to consider this method as promising in the treatment of sarcomas in children.