Radiation Therapy for Soft-Tissue Sarcomas: A Primer for Radiologists

Area of Science:

• Oncology
• Radiology
• Medical Physics

Background:

• Soft-tissue sarcomas (STS) are a diverse group of malignant tumors requiring multimodal treatment approaches.
• Radiation therapy (RT) is a cornerstone in STS management, often combined with surgery and chemotherapy.
• Evolving RT techniques and sophisticated imaging play critical roles in optimizing treatment outcomes.

Purpose of the Study:

• To provide radiologists with a comprehensive overview of RT indications in STS.
• To detail common RT modalities employed for STS treatment.
• To elucidate the integral role of various imaging modalities throughout the entire RT process for STS.

Main Methods:

• Review of current literature on RT for STS.
• Description of advanced RT techniques including intensity-modulated RT and stereotactic body RT.
• Discussion of imaging modalities such as CT, MRI, and PET/CT for staging, planning, and follow-up.

Main Results:

• High-quality imaging is vital for initial staging and local disease assessment before RT.
• Precise imaging is required for delineating target volumes (GTV, CTV, PTV) and critical organs at risk during RT planning.
• Post-treatment imaging is essential for evaluating treatment response and monitoring for recurrence or complications.

Conclusions:

• Radiologists must be familiar with RT indications and modalities for effective STS management.
• Integrated imaging strategies are crucial for optimizing RT efficacy and minimizing toxicity in STS patients.
• Continuous imaging surveillance is necessary for long-term follow-up of STS patients undergoing RT.