Objective:

To recover usable genetic information from medical specimens as old as 90 years to explore historical patterns of disease, particularly cancer.

Key Findings:

• The method successfully reconstructed and aligned fragmented DNA to the human genome.
• Microbial DNA analysis revealed expected gut bacteria and species linked to colorectal cancer.
• The approach could facilitate the investigation of long-term trends in tumor biology and the microbiome.

Interpretation:

This research suggests that historical pathology archives can provide valuable genomic insights when combined with advanced ancient DNA techniques.

Limitations:

• The study is currently limited to colorectal cancer samples.
• Further refinement of analyses is needed to fully understand microbial shifts over decades.

Conclusion:

The findings indicate that older archived specimens can be valuable for genomic studies, potentially aiding in tracking disease evolution over time.