Evolution and heterogeneity of lethal metastatic bladder cancer subtypes.

Metastasis-to-metastasis seeding dominates bladder cancer spread, with heterogeneity and early driver alterations linked to poor prognosis in specific subtypes.

• Why it matters: Understanding the evolutionary pathways and heterogeneity of metastatic bladder cancer is crucial for improving prognosis and developing targeted treatments, yet these aspects remain poorly characterized.
• What they did: Researchers reconstructed tumor evolution using rapid autopsy samples from patients with diverse histological subtypes, analyzing genomic, transcriptional, and microenvironmental features across 4,000 alterations.
• The result: Findings reveal subtype-specific genomic and immune profiles, with post-mortem cell-free DNA offering a promising noninvasive approach to assess tumor heterogeneity and guide personalized therapy.