Evidence map›Paper›PMID 35755001›Full record

ReviewImmuno-oncology technology2019

Tumour mutational burden: primary versus metastatic tissue creates systematic bias.

Desiree Schnidrig, Samra Turajlic, Kevin Litchfield

Erratum issuedOpen access · goldAbstract readReview
In one paragraph

Review in Immuno-oncology technology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 1 pooled it
2.0field-weighted citation impact, top 11% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed, 1 synthesis or guideline pooled it, 45 citations in OpenAlex.

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  5. Advances in Cancer Immunotherapy for Solid Tumors.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Desiree SchnidrigCancer Dynamics Laboratory, The Francis Crick Institute, London, UK.
Samra TurajlicCancer Dynamics Laboratory, The Francis Crick Institute, London, UK.
Kevin LitchfieldCancer Evolution and Genome Instability Laboratory, The Francis Crick Institute, London, UK.
The Francis Crick Institute · GB

Funding

Medical Research Council MR/P014712/1
6 · The paper itself

Abstract

Tumour mutational burden (TMB) has emerged as a reproducible biomarker to predict immunotherapy response across multiple cancer types. However, a key aspect of TMB measurement that is often overlooked is the source of tissue sample used, which creates a potential for systematic bias. The predominant source is either primary or metastatic tumour tissue. Primary tumours are more heterogeneous and reflect a longer period of tumour evolution, whereas metastases tend to have a more monoclonal structure and potentially different TMB scores. Studies to date measuring TMB have used a heterogeneous set of primary and metastatic tissues, which may explain some of the variability in predictive TMB values across studies. This paper presents data to show that there is a systematic difference whereby metastatic TMB is biased towards higher values than primary TMB (36% higher, paired Wilcoxon,

Indexed as

Immune checkpoint inhibitorMetastatic tumourPrimary tumourTumour mutational burden

Identifiers

PMID35755001
PMCPMC9216665
OpenAlexW2996529947

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.