1. Confidentiality: Most groups maintain a high level of confidentiality to ensure a safe and trusting environment. 2. Diverse Membership: Members may include patients, survivors, caregivers, and healthcare professionals from various backgrounds. 3. Structured Meetings: In-person groups often have a structured format with facilitated discussions, while online forums may be more informal. 4. Varied Topics: Discussions can range from medical treatments and side effects to emotional well-being and practical concerns.