Invited Session 2: Genome mapping and sequencing technologies for characterizing structural variants

Invited Session 2: Genome mapping and sequencing technologies for characterizing structural variants

🎙 Cancer Genomics Consortium 👥 1K 📅 February 4, 2026 ⏱ 57 min 👁 87 📄 expert opinion 🧭 2026-08-16
Available in: English (current) Français

Keywords

structural variantslong-read sequencingoptical genome mappingHi-Ccancer genomics

Summary

This invited session from the Cancer Genomics Consortium focuses on technologies for characterizing structural variants (SVs) in cancer, with a particular emphasis on pediatric cancers. Dr. Lisa Lansdon from Children’s Mercy Hospital begins by reviewing current clinical methods (karyotyping, FISH, microarray, short-read sequencing) and their limitations. She then introduces newer technologies: optical genome mapping (OGM), Hi-C, and long-read sequencing (PacBio HiFi and Oxford Nanopore). The main part of her talk presents a pilot study using long-read sequencing and a novel SV caller called ‘Seis’ on 17 pediatric leukemia cases. The study identified known and novel SVs, including a cryptic insertion in KMT2A that was missed by standard methods. Dr. Lansdon also discusses the clinical implementation of long-read sequencing at Children’s Mercy, including the GA4K study and the launch of clinical HiFi sequencing. The session concludes with a brief mention of ongoing validation efforts for clinical use.

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Critical Evaluation

Value of the Information & Strength of the Argument

The presentation provides valuable insights into the current state and future directions of structural variant detection in cancer. The argumentation is solid, based on the speakers’ extensive experience and preliminary data from their studies. The case study of the cryptic KMT2A insertion is compelling and illustrates the potential of long-read sequencing to uncover clinically relevant variants missed by traditional methods. The speakers acknowledge limitations and ongoing validation, which adds credibility.

Scientific Rigor, Source Quality, Title Accuracy

The scientific rigor is high, with detailed descriptions of methods and a clear presentation of a case study. The sources cited are primarily the speakers’ own work and the GA4K study, which is published. The title accurately reflects the content. No comments were provided, so no analysis of public trends is included.

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Title / Content Match

The title accurately reflects the content, which focuses on genome mapping and sequencing technologies for characterizing structural variants.

Quality & Reliability

8/10

The session features two experts in genomic medicine presenting their research and clinical experience. The content is technical and detailed, with a clear description of methods and a case study. However, it is primarily an expert opinion and preliminary data presentation, not a peer-reviewed study.

Key Moments

Cited Sources

  • Genomic Answers for Kids (GA4K) study — Mentioned as a large-scale long-read sequencing study for rare disease in children.
  • PacBio HiFi sequencing — Discussed as a long-read sequencing technology used in the study.
  • Oxford Nanopore sequencing — Discussed as an alternative long-read sequencing technology.

Concurring Sources

  • Genomic Answers for Kids (GA4K) study — The study is cited as a successful implementation of long-read sequencing in a clinical setting.

Contribution & Novelties

The session provides an expert overview of emerging technologies for structural variant detection in cancer, with a focus on long-read sequencing. The presentation of a pilot study using the novel Seis caller and the case of a cryptic KMT2A insertion highlights the potential of these technologies to uncover clinically relevant variants missed by standard methods. The discussion of clinical implementation at Children’s Mercy offers practical insights.

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Radar Profile

The radar profile shows high scores in technical level and information quality, reflecting the expert-level content and detailed methodology. The lower score in information quantity is due to the focused scope of the session. Overall, the profile indicates a highly technical and reliable presentation.

Reliability 8/10