Cited by 2Sarcoma Diagnosis and TreatmentCancer Genomics and DiagnosticsAcute Lymphoblastic Leukemia research

New Insights from Long-Term Clinical Use of Circulating Tumor DNA-Based Minimal Residual Disease Monitoring in Translocation-Associated Sarcomas

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Joch, Sophie, Smolle, Maria Anna, Kashofer, Karl, Thüringer, Andrea, Szkandera, Joanna, Benesch, Martin, El-Heliebi, Amin, Liegl-Atzwanger, Bernadette +2 more·2024·Oncology Research and Treatment

Abstract

INTRODUCTION: Assessment of circulating tumor DNA (ctDNA) as a means to monitor disease activity in translocation-associated tumors has become very popular in clinical practice. However, there are still few studies on its clinical application to date. Our study evaluates the clinical applicability of ctDNA as a biomarker for monitoring minimal residual disease (MRD) in patients with translocation-associated sarcomas. METHODS: In this retrospective study, we correlated 285 ctDNA samples from 34 patients diagnosed with translocation-associated sarcoma with the clinical course and images. Blood samples were collected at multiple time points during follow-up (median: 97 weeks, range: 7-398). RESULTS: We discovered a significant association between ctDNA levels and the clinical course of the disease, particularly noting differences between patients in remission or with progressive disease (p = 0.001). Furthermore, although we noted that ctDNA levels remained undetectable in a few cases of unilocular recurrence (n = 3), they were consistently higher in patients with multilocular recurrence (n = 14; p = 0.008). CONCLUSION: Monitoring ctDNA levels provides highly specific, additional information enabling early recurrence detection in patients with translocation-associated sarcomas during the follow-up and can be integrated into clinical practice. However, MRD monitoring by ctDNA quantification alone does not allow the reliable detection of 100% of unilocular recurrences and should be complemented by the use of conventional imaging techniques. INTRODUCTION: Assessment of circulating tumor DNA (ctDNA) as a means to monitor disease activity in translocation-associated tumors has become very popular in clinical practice. However, there are still few studies on its clinical application to date. Our study evaluates the clinical applicability of ctDNA as a biomarker for monitoring minimal residual disease (MRD) in patients with translocation-associated sarcomas. METHODS: In this retrospective study, we correlated 285 ctDNA samples from 34 patients diagnosed with translocation-associated sarcoma with the clinical course and images. Blood samples were collected at multiple time points during follow-up (median: 97 weeks, range: 7-398). RESULTS: We discovered a significant association between ctDNA levels and the clinical course of the disease, particularly noting differences between patients in remission or with progressive disease (p = 0.001). Furthermore, although we noted that ctDNA levels remained undetectable in a few cases of unilocular recurrence (n = 3), they were consistently higher in patients with multilocular recurrence (n = 14; p = 0.008). CONCLUSION: Monitoring ctDNA levels provides highly specific, additional information enabling early recurrence detection in patients with translocation-associated sarcomas during the follow-up and can be integrated into clinical practice. However, MRD monitoring by ctDNA quantification alone does not allow the reliable detection of 100% of unilocular recurrences and should be complemented by the use of conventional imaging techniques.

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  • Tumor-informed ctDNA monitoring in osteosarcoma and breakpoint-guided ctDNA monitoring in translocation-associated sarcomas currently have the clearest longitudinal clinical support.

    “Tumor-informed ctDNA monitoring in osteosarcoma and breakpoint-guided ctDNA monitoring in translocation-associated sarcomas currently have the clearest longitudinal clinical support, although both still require prospective multicenter validation before routine treatment decisions can be based on ctDNA alone [ 13 , 16 , 17 , 22 , 23 , 24 ].”
  • In Ewing sarcoma and other breakpoint-defined tumors, the disease-defining structural variant provides a stable and highly specific target for longitudinal monitoring.

    “In Ewing sarcoma and other breakpoint-defined tumors, the disease-defining structural variant provides a stable and highly specific target for longitudinal monitoring [ 13 , 22 , 23 ].”
  • Unilocular or low-volume recurrence may remain undetected by ctDNA in translocation-associated sarcomas.

    “However, unilocular or low-volume recurrence may remain undetected, emphasizing that ctDNA should not replace imaging [ 22 ].”
  • Ewing sarcoma and other translocation-associated sarcomas provide a different model because disease-defining structural variants can serve as highly specific molecular targets for longitudinal monitoring.

    “Ewing sarcoma and other translocation-associated sarcomas provide a different model because disease-defining structural variants can serve as highly specific molecular targets for longitudinal monitoring [ 13 , 22 , 23 ].”

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Authors
Joch, S., Smolle, M. A., Kashofer, K., Thüringer, A., Szkandera, J., Benesch, M., El-Heliebi, A., Liegl-Atzwanger, B., Leithner, A., & Seidel, M. G.
Affiliations
  • Medical University of Graz (AT)
  • University of Graz (AT)
Corresponding author
  • Smolle, Maria Anna
  • Kashofer, Karl
Venue
Oncology Research and Treatment
Publisher
S. Karger AG
Published
2024-12-23
Volume
48
Issue
4
Pages
186-196
ISSN
  • 2296-5262 (ISSN-L)
  • 2296-5270
OpenAlex
W4405720397
Cited by
2
References
19
Citations by year
2026: 2
FWCI
0.58
Type
journal article
Language
en
Open access
Locations
  • Oncology Research and Treatment (publishedVersion, cc-by-nc)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
Funders
  • Amgen
  • CSL Behring
  • Eisai
  • Medizinische Universität Graz
  • PharmaMar
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Sarcoma Diagnosis and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Acute Lymphoblastic Leukemia research
Keywords
circulating tumor DNA, minimal residual disease, liquid biopsy, recurrence detection, disease progression, prognostic factors, long-term follow-up, Ewing sarcoma family of tumors, rhabdomyosarcoma, osteosarcoma, soft tissue sarcoma, image correlation, treatment response monitoring
MeSH terms
Circulating Tumor DNA, Adolescent, Adult, Aged, Child, Female, Follow-Up Studies, Humans, Male, Middle Aged, Neoplasm Recurrence, Local, Retrospective Studies, Sarcoma, Translocation, Genetic, Biomarkers, Tumor, Neoplasm, Residual, Young Adult

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