body MRI. Here’s what to know if you’re considering one.

Key Points:

• Whole-body MRI scans and multi-cancer blood tests are increasingly sought by patients but remain investigational for most people without symptoms or high-risk factors, with unclear benefits and potential harms such as false positives, unnecessary biopsies, and anxiety.
• While whole-body MRI can be valuable for individuals with high inherited cancer risk, current evidence does not support its routine use for asymptomatic people, as it has not been proven to prolong life or be cost-effective.
• Multi-cancer blood tests like GRAIL’s Galleri show promising science but are not diagnostic, require follow-up testing for positive results, and have not yet demonstrated a clear reduction in late-stage cancer diagnoses or mortality.
• The high cost of these advanced screening tests raises concerns about healthcare inequities, potentially creating a two-tiered system where only wealthier patients can access earlier detection, while many lack access to established, proven preventive measures.
• Physicians should engage in open, empathetic discussions about the risks and benefits of these tests, ensuring patients understand their investigational nature and encouraging adherence to recommended screenings and vaccinations before considering expensive, unproven options.