Tumour Mutational Burden: How TMB Is Measured
Tumour mutational burden (TMB) is a count of mutations within an amount of sequenced DNA. It is a computationally derived metric whose reported value depends on panel size, filtering and pipeline choices.
Quick Answer
Tumour mutational burden (TMB) is a count of mutations within an amount of sequenced DNA. It is a computationally derived metric whose reported value depends on panel size, filtering and pipeline choices.
A Count With a Denominator
TMB is often expressed as mutations per megabase. Whole-exome and targeted-panel estimates are related but not identical measurements.
Why Platforms Differ
Panel breadth, variant filtering, germline handling and bioinformatics affect the estimate. Cross-platform comparison needs assay-aware calibration rather than a simple number match.
Key Takeaways
- ·TMB is assay-dependent.
- ·A value needs its unit, panel and method.
- ·TMB and MSI are separate biomarkers.
Put these genes in pathway context
Frequently asked questions
What is the key idea in Tumour Mutational Burden: How TMB Is Measured?
Tumour mutational burden (TMB) is a count of mutations within an amount of sequenced DNA. It is a computationally derived metric whose reported value depends on panel size, filtering and pipeline choices.
What should be kept with the result or mechanism?
TMB is assay-dependent. A value needs its unit, panel and method. TMB and MSI are separate biomarkers.
References
Continue Reading
Mutational Signatures: Reading a Tumour's History
3 min read
Neoantigens and Tumour Immunogenicity
3 min read
PD-L1 Testing Explained: Assays, Scores and Limits
2 min read
Clonal Evolution and Genomic Instability in Cancer
4 min read
DNA Mismatch Repair and Lynch Syndrome
4 min read
MSI-High vs TMB-High: Two Different Tumour Biomarkers
2 min read
Choose your next research step
Move from this explanation into a gene profile, a pathway map, or the next evidence update.
TP53 has 100+ trials currently recruiting on ClinicalTrials.gov. The GeneAnalyses digest summarises the new and changed ones each day.