Lesions that have Recurred after Prior Radiotherapy
Scope of the Problem
Several hundred thousand patients receive each year in the United States for a large variety of malignancies. The most commonly treated body sites include the lung, breast, prostate, pelvis, abdomen, central chest (mediastinum), head/neck, bones (usually for metastases – tumor deposits that have spread to the bone from other malignant primary tumors), lymph nodes, gynecologic organs and brain. Although radiotherapy technology continues to improve, resulting in ever improving cure rates, there is a measurable relapse rate for every treated site in the human body, ranging all the way from <10% (e.g. – stage I Prostate Cancer, stage I Breast Cancer) to virtually 100% (e.g. – Glioblastoma Multiforme – a highly malignant brain tumor).
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