At a glance
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A Phase II Trial of Preoperative Proton Therapy in Soft-tissue Sarcomas of the Extremities and Body Wall
In Brief
A clinical study evaluating proton radiation and surgery (wide local excision; limb preservation surgery) for Soft Tissue Sarcoma. Completed, enrolled 7 participants across 1 site.
Detailed Summary
When treated with surgery alone, many soft-tissue sarcomas have a high chance of coming back. Radiation therapy is frequently used in addition to surgery to reduce the chances of the sarcoma coming back. However, radiation can have long-term side effects on the normal tissues surrounding the tumor, leading to problems such as swelling, scarring, and joint stiffness. Recently, there have been advances in the way that radiation therapy can be given. Proton radiation therapy is one of those advances. With proton radiation, it is possible to give radiation over a smaller area surrounding the tumor, resulting in less radiation to the surrounding normal tissues. The purpose of this study is to determine whether proton radiation decreases the long-term side effects of radiation on normal tissues and if smaller proton radiation fields reduce local recurrence compared to the larger radiation fields that have been used in prior studies.
Study Details
Timeline
Interventions
proton radiation: 2 GyE/Day to isocenter, one treatment per day, 5 days per week for 25 treatments (=50 GyE to isocenter/25 fractions)
In areas with ample soft tissue that can be removed without compromising future function or wound closure, wide margins is the goal of treatment; associated rates of local failure are low in such instances. Margins will be determined by the surgeon; the goal is to achieve at least a 2 mm negative margin resection. However, smaller margins can be acceptable if it allows for limb-sparing surgery with conserved functional outcomes. Every effort will be made to have limb preservation surgery unless there is documented evidence of tumor progression during or after the course of radiation that would require amputation for an appropriate margin resection.