Several key organizations are involved in developing and disseminating cancer treatment guidelines: 1. National Comprehensive Cancer Network (NCCN): Provides detailed, evidence-based guidelines for various types of cancer. 2. American Society of Clinical Oncology (ASCO): Offers guidelines and resources to improve cancer care. 3. World Health Organization (WHO): Develops international guidelines and policies for cancer treatment and prevention. 4. European Society for Medical Oncology (ESMO): Creates guidelines tailored to the European healthcare context.