This report synthesises findings from 14 peer-reviewed papers addressing the following research question: To what extent do generalist medical AI models trained with self-supervision outperform task-specific models in zero-shot visual reasoning benchmarks across unseen medical modalities. 10 claims were extracted from source literature; 10 were independently verified against retrieved documents. An automated multi-reviewer quality assessment produced a score of 8.7/10. This report is a machine-generated literature synthesis and does not constitute original research.Research goal: To what extent do generalist medical AI models trained with self-supervision outperform task-specific models in zero-shot visual reasoning benchmarks across unseen medical modalities?Autonomous literature synthesis. Automated review score: 8.7/10. Full text and citation available at Assignee Research.