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MEDUSA: Maintaining Entire DNA Duplexes for Utmost Sequencing Accuracy

Tracking # 20-1396540

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Method Broadcasted Interactive Event
Dates Contact provider

Course overview

This webinar will introduce MEDUSA (Maintaining Entire DNA Duplexes for Utmost Sequencing Accuracy), a novel, streamlined library preparation method designed to mitigate duplex sequencing errors without sacrificing genome coverage. We will explore the mechanics of how trace dNTP carryover from end repair drives unintended strand resynthesis during dA-tailing, and explain how integrating an apyrase-mediated enzymatic step effectively blocks this resynthesis. Participants will discover how MEDUSA performs across challenging clinical specimens--including formalin-fixed paraffin-embedded tumor DNA and cell-free DNA--achieving ultra-low residual variant frequencies while maintaining about 100% genome coverage and excellent molecular recovery. Attendees will walk away with actionable insights on how to balance absolute sequencing accuracy with complete genomic breadth, making this session essential for anyone looking to optimize liquid biopsies, rare-variant assays, and clinical oncology workflows.

Subject areas

This course counts toward the state boards and subject areas below.

American Board of Clinical Chemistry

Clinical Chemistry Diplomate

1h Category 1

Molecular Diagnostics Diplomate

1h Category 1

Toxicological Chemistry Diplomate

1h Category 1

Florida Board of Clinical Laboratory Personnel

Clinical Laboratory Director

1h General (Molecular Pathology)

Clinical Laboratory Supervisor

1h General (Molecular Pathology)

Clinical Laboratory Technician

1h General (Molecular Pathology)

Clinical Laboratory Technologist

1h General (Molecular Pathology)

Public Health Director

1h General (Molecular Pathology)

Public Health Supervisor

1h General (Molecular Pathology)

Public Health Technologist

1h General (Molecular Pathology)

Disclosure statements

The Association for Diagnostics & Laboratory Medicine is dedicated to ensuring balance, independence, objectivity, and scientific rigor in all educational activities. All participating planning committee members and faculty are required to disclose to the program audience any financial relationships related to the subject matter of this program. Disclosure information is reviewed in advance in order to manage and resolve any possible conflicts of interest. The intent of this disclosure is to provide participants with information on which they can make their own judgments.


The following faculty reported no financial relationships:

  • Linnea M. Baudhuin, PhD, DABMGG, FACMG
  • Kan Xiong, PhD