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Sep 29
Education

International 05 - Reirradiation in Radiation Oncology: A Latin American Perspective on Biology, Technology and Clinical Decision Making (Session in Spanish)

02:00pm - 03:30pm ET
Global Oncology/International

MODERATOR(S)

Lina Loaiza, MD - Clínica somer

session DESCRIPTION

Reirradiation represents one of the most complex and rapidly evolving areas in contemporary radiation oncology and requires a solid understanding of radiobiological principles, cumulative dose effects and normal tissue tolerance. In Latin America, increasing life expectancy, together with advances in early cancer detection and oncologic treatments, has resulted in a growing population of long-term cancer survivors. As a result, local and regional recurrences after prior radiotherapy are being encountered with increasing frequency in routine clinical practice. In this context, reirradiation may offer meaningful disease control or curative potential when applied using rigorous criteria for patient selection, treatment planning and safety. This education session will provide a critical, evidence-based review of reirradiation strategies across several clinically relevant disease sites: brain tumors, prostate cancer, head and neck malignancies and rectal cancer. Evidence from prospective studies, large retrospective series, and international consensus guidelines will be integrated, with particular emphasis on applicability in resource-variable health care systems. The session will begin with a moderator-led overview of the fundamental principles of reirradiation and the current landscape in Latin America, including access to technology, availability of advanced techniques, immobilization standards, imaging resources and protocol implementation. All subsequent presentations will follow a standardized, case-based format, starting with a representative clinical case and followed by a structured topic review based on current evidence, clinical experience and adaptation to available resources. Emphasis will be placed on advanced radiotherapy techniques (IMRT, VMAT, SRS, SBRT), dose summation strategies, and balancing therapeutic benefit, patient longevity, and short- and long-term toxicity.

learning objectives

  1. Explain the key radiobiological principles and cumulative dose considerations that guide safe and effective reirradiation across different disease sites in Latin American clinical practice.
  2. Apply evidence-based planning, dose summation and advanced delivery strategies (IMRT, VMAT, SRS, SBRT) to optimize tumor control while minimizing acute and late toxicity in resource-variable environments.

Credits

AMA PRA Category 1 Credits: 1.50

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