Evidence map›Paper›PMID 40346007›Full record

ArticleCancer medicine2025

Performance Comparison of Droplet Digital PCR and Next-Generation Sequencing for Circulating Tumor DNA Detection in Non-Metastatic Rectal Cancer.

Säde Szeto, Soili Kytölä, Erdogan Pekcan Erkan, Maarit Ahtiainen, Jukka-Pekka Mecklin, Teijo Kuopio, Ville Sallinen, Anna Lepistö, Laura Koskenvuo, Laura Renkonen-Sinisalo and 9 more

Abstract readComparative Study
In one paragraph

Article in Cancer medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

10 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

19 authors.

Säde SzetoApplied Tumor Genomics Research Program, Research Program Unit, Faculty of Medicine, University of Helsinki, Helsinki, Finland.ORCID https://orcid.org/0009-0006-5603-1860
Soili KytöläDepartment of Genetics, HUS Diagnostic Center, Helsinki University Hospital, Helsinki, Finland.
Erdogan Pekcan ErkanApplied Tumor Genomics Research Program, Research Program Unit, Faculty of Medicine, University of Helsinki, Helsinki, Finland.
Maarit AhtiainenDepartment of Molecular Pathology, Central Finland Hospital Nova, Wellbeing Services County of Central Finland, Jyväskylä, Finland.
Jukka-Pekka MecklinDepartment of Education and Science, Central Finland Hospital Nova, Wellbeing Services County of Central Finland, Jyväskylä, Finland.
Teijo KuopioDepartment of Molecular Pathology, Central Finland Hospital Nova, Wellbeing Services County of Central Finland, Jyväskylä, Finland.
Ville SallinenDepartment of Gastroenterological Surgery, Helsinki University Hospital and University of Helsinki, Helsinki, Finland.
Anna LepistöDepartment of Gastroenterological Surgery, Helsinki University Hospital and University of Helsinki, Helsinki, Finland.
Laura KoskenvuoDepartment of Gastroenterological Surgery, Helsinki University Hospital and University of Helsinki, Helsinki, Finland.
Laura Renkonen-SinisaloDepartment of Gastroenterological Surgery, Helsinki University Hospital and University of Helsinki, Helsinki, Finland.
Anu AnttonenDepartment of Oncology, HUS Comprehensive Cancer Centre and University of Helsinki, Helsinki, Finland.
Kukka HeiskalaDepartment of Oncology, HUS Comprehensive Cancer Centre and University of Helsinki, Helsinki, Finland.
Sanni TulokasDepartment of Oncology, HUS Comprehensive Cancer Centre and University of Helsinki, Helsinki, Finland.
Siru MäkeläDepartment of Oncology, HUS Comprehensive Cancer Centre and University of Helsinki, Helsinki, Finland.
Erkki-Ville WirtaFaculty of Medicine and Health Technology, Tampere University and Tays Cancer Centre, Tampere University Hospital, Tampere, Finland.
Tuija TuunanenDepartment of Oncology, Tampere University Hospital, Tampere, Finland.
Tapio SalminenDepartment of Oncology, Tampere University Hospital, Tampere, Finland.
Ari RistimäkiApplied Tumor Genomics Research Program, Research Program Unit, Faculty of Medicine, University of Helsinki, Helsinki, Finland.
Toni T SeppäläApplied Tumor Genomics Research Program, Research Program Unit, Faculty of Medicine, University of Helsinki, Helsinki, Finland.ORCID https://orcid.org/0000-0002-4940-3498

Funding

Biomedicum Helsinki SäätiöJane ja Aatos Erkon SäätiöRelander FoundationResearch Council of Finland 338657Sigrid Juséliuksen SäätiöSuomen Lääketieteen SäätiöSyöpäsäätiöThe Finnish Government TYH2021123The Finnish Government TYH2022323
6 · The paper itself

Abstract

BACKGROUND AND

objectivesCirculating tumor DNA (ctDNA) can potentially identify rectal cancer patients benefiting from neoadjuvant and adjuvant therapy. This study compared droplet digital PCR (ddPCR) and next-generation sequencing (NGS) for ctDNA detection in localized rectal cancer before and after surgery.

methodsPre-therapy plasma and rectal tumor samples were collected from a development group (n = 41) and a validation group (n = 26). Mutations in tumor samples were identified using NGS, and ctDNA detection was performed with both ddPCR and NGS. Recurrence was assessed 1 year after surgery in the development group.

resultsIn the development group, ddPCR detected ctDNA in 24/41 (58.5%) and NGS panel in 15/41 (36.6%; p = 0.00075) of the baseline plasma. In the validation group, 21/26 (80.8%) patients had detectable ctDNA in the pre-therapy plasma. A positive ctDNA result was associated with higher clinical tumor stage and with lymph node positivity as detected by MRI. Postoperative ddPCR did not detect ctDNA before most recurrences.

conclusionsWe demonstrated a practical oligomarker ctDNA test for localized rectal cancer suitable for clinical workflow, and that ddPCR detects ctNA from pre-therapy plasma at a satisfactory level in advanced rectal cancers. Detecting ctDNA with ddPCR may help to assess the local severity, but the clinical utility of this approach should be evaluated in clinical trials.

Indexed as

Biomarkers, TumorCirculating Tumor DNAHigh-Throughput Nucleotide SequencingPolymerase Chain ReactionRectal NeoplasmsAdultAgedAged, 80 and overFemaleHumansMaleMiddle AgedMutationNeoplasm Recurrence, LocalBiomarkers, TumorCirculating Tumor DNAcirculating tumor DNActDNAddPCRNGSrectal cancer

Identifiers

PMID40346007
PMCPMC12062871

What OpenQuestion holds

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Registered trials

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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.