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Van der Linden M, Van Gaever B, Raman L, Vermaelen K, Demedts I, Surmont V, Himpe U, Lievens Y, Ferdinande L, Dedeurwaerdere F, Van der Meulen J, Claes K, Menten B, Van Dorpe J. Application of an Ultrasensitive NGS-Based Blood Test for the Diagnosis of Early-Stage Lung Cancer: Sensitivity, a Hurdle Still Difficult to Overcome. Cancers (Basel) 2022; 14:cancers14082031. [PMID: 35454937 PMCID: PMC9026713 DOI: 10.3390/cancers14082031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 04/12/2022] [Accepted: 04/12/2022] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Currently, an accurate diagnosis of lung cancer relies on the microscopic examination of tissue biopsies. These samples can, however, only be obtained by invasive procedures. The aim of our study was to evaluate the use of a liquid biopsy for early-stage lung cancer detection in patients with a lung lesion on imaging. This approach would be particularly relevant for suspected lung lesions that are difficult to reach for a tissue-based diagnosis. Despite technical improvements for the use of liquid biopsy-based cell-free DNA analysis, its application for the detection of early-stage lung cancer is currently limited by sensitivity and a biological background of somatic variants. Abstract Diagnosis of lung cancer requires histological examination of a tissue sample, which in turn requires an invasive procedure that cannot always be obtained. Circulating tumor DNA can be reliably detected in blood samples of advanced-stage lung cancer patients and might also be a minimally invasive alternative for early-stage lung cancer detection. We wanted to explore the potential of targeted deep sequencing as a test for the diagnosis of early-stage lung cancer in combination with imaging. Mutation detection on cell-free DNA from pretreatment plasma samples of 51 patients with operable non-small cell lung cancer was performed and results were compared with 12 control patients undergoing surgery for a non-malignant lung lesion. By using a variant allele frequency threshold of 1%, somatic variants were detected in 23.5% of patients with a median variant allele fraction of 3.65%. By using this threshold, we could almost perfectly discriminate early-stage lung cancer patients from controls. Our study results are discussed in the light of those from other studies. Notwithstanding the potential of today’s techniques for the use of liquid biopsy-based cell-free DNA analysis, sensitivity of this application for early-stage lung cancer detection is currently limited by a biological background of somatic variants with low variant allele fraction.
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Affiliation(s)
- Malaïka Van der Linden
- Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium; (M.V.d.L.); (B.V.G.); (L.R.); (L.F.)
- Cancer Research Institute Ghent, 9000 Ghent, Belgium; (K.V.); (Y.L.); (J.V.d.M.); (K.C.)
| | - Bram Van Gaever
- Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium; (M.V.d.L.); (B.V.G.); (L.R.); (L.F.)
- Department of Pathology, Ghent University Hospital, 9000 Ghent, Belgium
| | - Lennart Raman
- Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium; (M.V.d.L.); (B.V.G.); (L.R.); (L.F.)
| | - Karim Vermaelen
- Cancer Research Institute Ghent, 9000 Ghent, Belgium; (K.V.); (Y.L.); (J.V.d.M.); (K.C.)
- Department of Pulmonary Medicine, Ghent University Hospital, 9000 Ghent, Belgium;
- Department of Internal Medicine and Pediatrics, Ghent University, 9000 Ghent, Belgium
| | - Ingel Demedts
- Department of Pulmonary Medicine, AZ Delta, 8800 Roeselare, Belgium; (I.D.); (U.H.)
| | - Veerle Surmont
- Department of Pulmonary Medicine, Ghent University Hospital, 9000 Ghent, Belgium;
- Department of Internal Medicine and Pediatrics, Ghent University, 9000 Ghent, Belgium
| | - Ulrike Himpe
- Department of Pulmonary Medicine, AZ Delta, 8800 Roeselare, Belgium; (I.D.); (U.H.)
| | - Yolande Lievens
- Cancer Research Institute Ghent, 9000 Ghent, Belgium; (K.V.); (Y.L.); (J.V.d.M.); (K.C.)
- Department of Radiation Oncology, Ghent University Hospital, 9000 Ghent, Belgium
- Department of Human Structure and Repair, Ghent University, 9000 Ghent, Belgium
| | - Liesbeth Ferdinande
- Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium; (M.V.d.L.); (B.V.G.); (L.R.); (L.F.)
- Department of Pathology, Ghent University Hospital, 9000 Ghent, Belgium
| | | | - Joni Van der Meulen
- Cancer Research Institute Ghent, 9000 Ghent, Belgium; (K.V.); (Y.L.); (J.V.d.M.); (K.C.)
- Center for Medical Genetics, Ghent University Hospital, 9000 Ghent, Belgium;
- Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
| | - Kathleen Claes
- Cancer Research Institute Ghent, 9000 Ghent, Belgium; (K.V.); (Y.L.); (J.V.d.M.); (K.C.)
- Center for Medical Genetics, Ghent University Hospital, 9000 Ghent, Belgium;
- Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
| | - Björn Menten
- Center for Medical Genetics, Ghent University Hospital, 9000 Ghent, Belgium;
- Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
| | - Jo Van Dorpe
- Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium; (M.V.d.L.); (B.V.G.); (L.R.); (L.F.)
- Cancer Research Institute Ghent, 9000 Ghent, Belgium; (K.V.); (Y.L.); (J.V.d.M.); (K.C.)
- Department of Pathology, Ghent University Hospital, 9000 Ghent, Belgium
- Correspondence:
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Van der Eecken K, Van der Linden M, Raman L, Creytens D, Dedeurwaerdere F, De Winne K, Ferdinande L, Lammens M, Menten B, Rottiers I, Van Gaever B, Van den Broecke C, Van de Vijver K, Van Roy N, Verbeke S, Van Dorpe J. Shallow whole-genome sequencing: a useful, easy to apply molecular technique for CNA detection on FFPE tumor tissue-a glioma-driven study. Virchows Arch 2022; 480:677-686. [PMID: 35034191 DOI: 10.1007/s00428-022-03268-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 12/10/2021] [Accepted: 01/03/2022] [Indexed: 11/27/2022]
Abstract
Copy number alterations (CNAs) have increasingly become part of the diagnostic algorithm of glial tumors. Alterations such as homozygous deletion of CDKN2A/B, 7 +/ 10 - chromosome copy number changes or EGFR amplification are predictive of a poor prognosis. The codeletion of chromosome arms 1p and 19q, typically associated with oligodendroglioma, implies a more favorable prognosis. Detection of this codeletion by the current diagnostic standard, being fluorescence in situ hybridization (FISH), is sometimes however subject to technical and interpretation problems. In this study, we evaluated CNA detection by shallow whole-genome sequencing (sWGS) as an inexpensive, complementary molecular technique. A cohort of 36 glioma tissue samples, enriched with "difficult" and "ambiguous" cases, was analyzed by sWGS. sWGS results were compared with FISH assays of chromosomes 1p and 19q. In addition, CNAs relevant to glioblastoma diagnosis were explored. In 4/36 samples, EGFR (7p11.2) amplifications and homozygous loss of CDKN2A/B were identified by sWGS. Six out of 8 IDH-wild-type glioblastomas demonstrated a prognostic chromosome 7/chromosome 10 signature. In 11/36 samples, local interstitial and terminal 1p/19q alterations were detected by sWGS, implying that FISH's targeted nature might promote false arm-level extrapolations. In this cohort, differences in overall survival between patients with and without codeletion were better pronounced by the sequencing-based distinction (likelihood ratio of 7.48) in comparison to FISH groupings (likelihood ratio of 0.97 at diagnosis and 1.79 ± 0.62 at reobservation), suggesting sWGS is more accurate than FISH. We recognized adverse effects of tissue block age on FISH signals. In addition, we show how sWGS reveals relevant aberrations beyond the 1p/19q state, such as EGFR amplification, combined gain of chromosome 7 and loss of chromosome 10, and homozygous loss of CDKN2A/B. The findings presented by this study might stimulate implementation of sWGS as a complementary, easy to apply technique for copy number detection.
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Affiliation(s)
- Kim Van der Eecken
- Department of Pathology, Ghent University, Ghent University Hospital, Ghent, Belgium
- Cancer Research Institute (CRIG), Ghent, Belgium
| | - Malaïka Van der Linden
- Department of Pathology, Ghent University, Ghent University Hospital, Ghent, Belgium
- Cancer Research Institute (CRIG), Ghent, Belgium
- Center for Medical Genetics, Department of Biomolecular Medicine, Ghent University, Ghent University Hospital, Ghent, Belgium
| | - Lennart Raman
- Department of Pathology, Ghent University, Ghent University Hospital, Ghent, Belgium
- Center for Medical Genetics, Department of Biomolecular Medicine, Ghent University, Ghent University Hospital, Ghent, Belgium
| | - David Creytens
- Department of Pathology, Ghent University, Ghent University Hospital, Ghent, Belgium
- Cancer Research Institute (CRIG), Ghent, Belgium
| | | | - Koen De Winne
- Department of Pathology, Antwerp University Hospital, Antwerp, Belgium
| | - Liesbeth Ferdinande
- Department of Pathology, Ghent University, Ghent University Hospital, Ghent, Belgium
- Cancer Research Institute (CRIG), Ghent, Belgium
| | - Martin Lammens
- Department of Pathology, Antwerp University Hospital, Antwerp, Belgium
| | - Björn Menten
- Cancer Research Institute (CRIG), Ghent, Belgium
- Center for Medical Genetics, Department of Biomolecular Medicine, Ghent University, Ghent University Hospital, Ghent, Belgium
| | - Isabelle Rottiers
- Department of Pathology, Ghent University, Ghent University Hospital, Ghent, Belgium
- Cancer Research Institute (CRIG), Ghent, Belgium
| | - Bram Van Gaever
- Department of Pathology, Ghent University, Ghent University Hospital, Ghent, Belgium
| | | | - Koen Van de Vijver
- Department of Pathology, Ghent University, Ghent University Hospital, Ghent, Belgium
- Cancer Research Institute (CRIG), Ghent, Belgium
| | - Nadine Van Roy
- Cancer Research Institute (CRIG), Ghent, Belgium
- Center for Medical Genetics, Department of Biomolecular Medicine, Ghent University, Ghent University Hospital, Ghent, Belgium
| | - Sofie Verbeke
- Department of Pathology, Ghent University, Ghent University Hospital, Ghent, Belgium
- Cancer Research Institute (CRIG), Ghent, Belgium
| | - Jo Van Dorpe
- Department of Pathology, Ghent University, Ghent University Hospital, Ghent, Belgium.
- Cancer Research Institute (CRIG), Ghent, Belgium.
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Cordier F, Van der Meulen J, Van Gaever B, Lapeire L, Sys G, Van Dorpe J, Creytens D. Undifferentiated sarcoma of bone with a round to epithelioid cell phenotype harboring a novel EWSR1-SSX2 fusion identified by RNA-based next-generation sequencing. Genes Chromosomes Cancer 2021; 61:44-49. [PMID: 34538011 DOI: 10.1002/gcc.22999] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 08/31/2021] [Accepted: 09/14/2021] [Indexed: 11/09/2022] Open
Abstract
Due to the increased application of RNA-based next-generation sequencing techniques on bone and soft tissue round cell sarcomas new fusions are frequently found, thereby expanding the molecular landscape of these tumors. In this report, we describe and discuss the finding of an undifferentiated sarcoma of the bone with a round to epithelioid cell phenotype harboring a novel EWSR1-SSX2 fusion. Treatment of this new bone tumor entity according to the Euro Ewing 2012 protocol led to complete pathologic response.
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Affiliation(s)
- Fleur Cordier
- Department of Pathology, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Joni Van der Meulen
- Molecular Diagnostics Ghent University Hospital (MDG), Ghent University Hospital, Ghent University, Ghent, Belgium.,CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Bram Van Gaever
- Department of Pathology, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Lore Lapeire
- CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium.,Department of Medical Oncology, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Gwen Sys
- CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium.,Department of Traumatology and Orthopaedics, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Jo Van Dorpe
- Department of Pathology, Ghent University Hospital, Ghent University, Ghent, Belgium.,CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - David Creytens
- Department of Pathology, Ghent University Hospital, Ghent University, Ghent, Belgium.,CRIG, Cancer Research Institute Ghent, Ghent University Hospital, Ghent University, Ghent, Belgium
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