1
|
Eriksen PRG, de Groot F, Clasen-Linde E, de Nully Brown P, de Groen R, Melchior LC, Maier AD, Minderman M, Vermaat JSP, von Buchwald C, Pals ST, Heegaard S. Sinonasal DLBCL: molecular profiling identifies subtypes with distinctive prognosis and targetable genetic features. Blood Adv 2024; 8:1946-1957. [PMID: 38324724 PMCID: PMC11017287 DOI: 10.1182/bloodadvances.2023011517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 01/02/2024] [Accepted: 01/25/2024] [Indexed: 02/09/2024] Open
Abstract
ABSTRACT Primary sinonasal diffuse large B-cell lymphoma (PSDLBCL) is a rare lymphoma with a variable prognosis and a unique relapse/dissemination pattern involving the central nervous system and skin. The underlying molecular mechanisms leading to this heterogeneity and progression pattern remain uncharted, hampering patient-tailored treatment. To investigate associated mechanisms, we analyzed clinical data and used immunohistochemistry, gene-expression profiling, cytogenetics, and next-generation sequencing in a cohort of 117 patients with PSDLBCL. The distribution in cell-of-origin (COO) was 68 (58%) activated B-cell (ABC), 44 (38%) germinal center B-cell (GCB), and 5 (4%) unclassifiable. COO was significantly associated with progression-free survival (PFS) and lymphoma-specific mortality (LSM) in both the overall cohort (5-year PFS: ABC, 43% vs GCB, 73%; LSM: ABC, 45% vs GCB, 14%) and in the subgroup of patients receiving immunochemotherapy (5-year PFS: ABC, 55% vs GCB, 85%; LSM: ABC, 28% vs GCB, 0%). ABC lymphomas were mainly MCD class, showing a high prevalence of MYD88 (74%) and CD79B (35%) mutations compared with GCB lymphomas (MYD88 23%; CD79B 10%) (P < .01). The ABC subtype frequently displayed cMYC/BCL2 coexpression (76% vs 18% GCB; P < .001) and HLA-II loss (48% vs 10% GCB; P < .001). PD-L1 expression and copy-number alterations were rare. All lymphomas were Epstein-Barr virus-negative. Our data suggest molecular profiling as a potent tool for detecting prognostic subgroups in PSDLBCL, exposing links to known relapse/dissemination sites. The ABC subgroup's MCD genetic features, shared with lymphomas at other nonprofessional lymphoid sites, make them potential candidates for targeted B-cell and toll-like receptor signaling therapy.
Collapse
Affiliation(s)
- Patrick R. G. Eriksen
- Department of Otorhinolaryngology, Head and Neck Surgery and Audiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Fleur de Groot
- Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands
| | - Erik Clasen-Linde
- Department of Pathology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Peter de Nully Brown
- Department of Hematology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Ruben de Groen
- Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands
| | - Linea C. Melchior
- Department of Pathology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Andrea D. Maier
- Department of Neurosurgery, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Marthe Minderman
- Department of Pathology and Cancer Center Amsterdam, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Joost S. P. Vermaat
- Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands
| | - Christian von Buchwald
- Department of Otorhinolaryngology, Head and Neck Surgery and Audiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Steven T. Pals
- Department of Pathology and Cancer Center Amsterdam, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Steffen Heegaard
- Department of Pathology, Eye Section, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| |
Collapse
|
2
|
Urbanska EM, Grauslund M, Koffeldt PR, Truelsen SLB, Löfgren JO, Costa JC, Melchior LC, Sørensen JB, Santoni-Rugiu E. Real-World Data on Combined EGFR-TKI and Crizotinib Treatment for Acquired and De Novo MET Amplification in Patients with Metastatic EGFR-Mutated NSCLC. Int J Mol Sci 2023; 24:13077. [PMID: 37685884 PMCID: PMC10487649 DOI: 10.3390/ijms241713077] [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: 07/30/2023] [Revised: 08/15/2023] [Accepted: 08/19/2023] [Indexed: 09/10/2023] Open
Abstract
Amplification of the mesenchymal epithelial transition (MET) gene is a mechanism of acquired resistance to epidermal growth factor receptor (EGFR)-tyrosine-kinase-inhibitors (TKIs) in over 20% of patients with advanced EGFR-mutated (EGFRm+) non-small lung cancer (NSCLC). However, it may also occur de novo in 2-8% of EGFRm+ NSCLC cases as a potential mechanism of intrinsic resistance. These patients represent a group with unmet needs, since there is no standard therapy currently approved. Several new MET inhibitors are being investigated in clinical trials, but the results are awaited. Meanwhile, as an alternative strategy, combinations of EGFR-TKIs with the MET/ALK/ROS1-TKI Crizotinib may be used in this setting, despite this use is principally off-label. Thus, we studied five of these MET amplified cases receiving EGFR-TKI and Crizotinib doublet after progression on EGFR-TKI treatment to assess the benefits and challenges related to this combination and the possible occurrence of genomic and phenotypic co-alterations. Furthermore, we compared our cases with other real-world reports on Crizotinib/EGFR-TKI combinations, which appeared effective, especially in patients with high-level MET amplification. Yet, we observed that the co-occurrence of other genomic and phenotypical alterations may affect the response to combined EGFR-TKI and Crizotinib. Finally, given the heterogeneity of MET amplification, the diagnostic methods for assessing it may be discrepant. In this respect, we observed that for optimal detection, immunohistochemistry, fluorescence in situ hybridization, and next-generation sequencing should be used together, as these methods possess different sensitivities and complement each other in characterizing MET amplification. Additionally, we addressed the issue of managing EGFR-mutated NSCLC patients with de novo MET amplification causing primary EGFR-TKI resistance. We conclude that, while data from clinical trials with new MET inhibitors are still pending, adding Crizotinib to EGFR-TKI in NSCLC patients acquiring MET amplification at progression on EGFR-TKI monotherapy is a reasonable approach, with a progression-free survival of 3-19 months.
Collapse
Affiliation(s)
- Edyta M. Urbanska
- Department of Oncology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark;
| | - Morten Grauslund
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark; (M.G.); (P.R.K.); (S.L.B.T.); (L.C.M.)
| | - Peter R. Koffeldt
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark; (M.G.); (P.R.K.); (S.L.B.T.); (L.C.M.)
| | - Sarah L. B. Truelsen
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark; (M.G.); (P.R.K.); (S.L.B.T.); (L.C.M.)
| | - Johan O. Löfgren
- Department of Clinical Physiology and Nuclear Medicine, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark;
| | - Junia C. Costa
- Department of Radiology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark;
| | - Linea C. Melchior
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark; (M.G.); (P.R.K.); (S.L.B.T.); (L.C.M.)
| | - Jens B. Sørensen
- Department of Oncology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark;
- Department of Clinical Medicine, University of Copenhagen, DK-2200 Copenhagen, Denmark
| | - Eric Santoni-Rugiu
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark; (M.G.); (P.R.K.); (S.L.B.T.); (L.C.M.)
- Department of Clinical Medicine, University of Copenhagen, DK-2200 Copenhagen, Denmark
| |
Collapse
|
3
|
Bogumil H, Sill M, Schrimpf D, Ismer B, Blume C, Rahmanzade R, Hinz F, Cherkezov A, Banan R, Friedel D, Reuss DE, Selt F, Ecker J, Milde T, Pajtler KW, Schittenhelm J, Hench J, Frank S, Boldt HB, Kristensen BW, Scheie D, Melchior LC, Olesen V, Sehested A, Boué DR, Abdullaev Z, Satgunaseelan L, Kurth I, Seidlitz A, White CL, Ng HK, Shi ZF, Haberler C, Deckert M, Timmer M, Goldbrunner R, Tauziède-Espariat A, Varlet P, Brandner S, Alexandrescu S, Snuderl M, Aldape K, Korshunov A, Witt O, Herold-Mende C, Unterberg A, Wick W, Pfister SM, von Deimling A, Jones DTW, Sahm F, Sievers P. Glioneuronal tumor with ATRX alteration, kinase fusion and anaplastic features (GTAKA): a molecularly distinct brain tumor type with recurrent NTRK gene fusions. Acta Neuropathol 2023; 145:667-680. [PMID: 36933012 PMCID: PMC10119244 DOI: 10.1007/s00401-023-02558-0] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 03/07/2023] [Accepted: 03/07/2023] [Indexed: 03/19/2023]
Abstract
Glioneuronal tumors are a heterogenous group of CNS neoplasms that can be challenging to accurately diagnose. Molecular methods are highly useful in classifying these tumors-distinguishing precise classes from their histological mimics and identifying previously unrecognized types of tumors. Using an unsupervised visualization approach of DNA methylation data, we identified a novel group of tumors (n = 20) that formed a cluster separate from all established CNS tumor types. Molecular analyses revealed ATRX alterations (in 16/16 cases by DNA sequencing and/or immunohistochemistry) as well as potentially targetable gene fusions involving receptor tyrosine-kinases (RTK; mostly NTRK1-3) in all of these tumors (16/16; 100%). In addition, copy number profiling showed homozygous deletions of CDKN2A/B in 55% of cases. Histological and immunohistochemical investigations revealed glioneuronal tumors with isomorphic, round and often condensed nuclei, perinuclear clearing, high mitotic activity and microvascular proliferation. Tumors were mainly located supratentorially (84%) and occurred in patients with a median age of 19 years. Survival data were limited (n = 18) but point towards a more aggressive biology as compared to other glioneuronal tumors (median progression-free survival 12.5 months). Given their molecular characteristics in addition to anaplastic features, we suggest the term glioneuronal tumor with ATRX alteration, kinase fusion and anaplastic features (GTAKA) to describe these tumors. In summary, our findings highlight a novel type of glioneuronal tumor driven by different RTK fusions accompanied by recurrent alterations in ATRX and homozygous deletions of CDKN2A/B. Targeted approaches such as NTRK inhibition might represent a therapeutic option for patients suffering from these tumors.
Collapse
Affiliation(s)
- Henri Bogumil
- Department of Neuropathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Martin Sill
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany.,Division of Pediatric Neurooncology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Daniel Schrimpf
- Department of Neuropathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Britta Ismer
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany.,Division of Pediatric Glioma Research, German Cancer Research Center (DKFZ), Heidelberg, Germany.,Faculty of Biosciences, Heidelberg University, Heidelberg, Germany
| | - Christina Blume
- Department of Neuropathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Ramin Rahmanzade
- Department of Neuropathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Felix Hinz
- Department of Neuropathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Asan Cherkezov
- Department of Neuropathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Rouzbeh Banan
- Department of Neuropathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Dennis Friedel
- Department of Neuropathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - David E Reuss
- Department of Neuropathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Florian Selt
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany.,Clinical Cooperation Unit Pediatric Oncology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Pediatric Oncology, Hematology, Immunology and Pulmonology, University Hospital Heidelberg, Heidelberg, Germany.,National Center for Tumor Diseases (NCT), Heidelberg, Germany
| | - Jonas Ecker
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany.,Clinical Cooperation Unit Pediatric Oncology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Pediatric Oncology, Hematology, Immunology and Pulmonology, University Hospital Heidelberg, Heidelberg, Germany.,National Center for Tumor Diseases (NCT), Heidelberg, Germany
| | - Till Milde
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany.,Clinical Cooperation Unit Pediatric Oncology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Pediatric Oncology, Hematology, Immunology and Pulmonology, University Hospital Heidelberg, Heidelberg, Germany.,National Center for Tumor Diseases (NCT), Heidelberg, Germany
| | - Kristian W Pajtler
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany.,Division of Pediatric Neurooncology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Pediatric Oncology, Hematology, Immunology and Pulmonology, University Hospital Heidelberg, Heidelberg, Germany
| | - Jens Schittenhelm
- Center for Neuro-Oncology, Comprehensive Cancer Center Tübingen-Stuttgart, University Hospital Tübingen, Eberhard-Karls-University Tübingen, Tübingen, Germany.,German Cancer Consortium (DKTK), DKFZ Partner Site Tübingen, Tübingen, Germany.,Department of Neuropathology, University Hospital Tübingen, Eberhard-Karls-University Tübingen, Tübingen, Germany
| | - Jürgen Hench
- Division of Neuropathology, Institute for Pathology, University Hospital Basel, Basel, Switzerland
| | - Stephan Frank
- Division of Neuropathology, Institute for Pathology, University Hospital Basel, Basel, Switzerland
| | - Henning B Boldt
- Department of Pathology, Odense University Hospital, Odense, Denmark.,Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Bjarne Winther Kristensen
- Department of Pathology, Odense University Hospital, Odense, Denmark.,Department of Clinical Research, University of Southern Denmark, Odense, Denmark.,Department of Pathology, The Bartholin Institute, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark.,Department of Clinical Medicine and Biotech Research & Innovation Centre (BRIC), University of Copenhagen, Copenhagen, Denmark
| | - David Scheie
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Linea C Melchior
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Viola Olesen
- Spine Unit, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Astrid Sehested
- Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital, Copenhagen, Denmark
| | - Daniel R Boué
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital and the Ohio State University, Columbus, OH, USA
| | - Zied Abdullaev
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | | | - Ina Kurth
- Division of Radiooncology-Radiobiology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Annekatrin Seidlitz
- National Center for Tumor Diseases (NCT), Heidelberg, Germany.,Department of Radiation Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,National Center for Tumor Diseases (NCT), Partner Site Dresden, Dresden, Germany.,OncoRay-National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany.,German Cancer Research Center (DKFZ), Heidelberg and German Consortium for Translational Cancer Research (DKTK) Partner Site, Dresden, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany.,Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,Helmholtz Association/Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany
| | - Christine L White
- Hudson Institute of Medical Research, Clayton, Australia.,Department of Molecular and Translational Science, Monash University, Clayton, Australia.,Victorian Clinical Genetics Services, Parkville, Australia
| | - Ho-Keung Ng
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong, China.,Hong Kong and Shanghai Brain Consortium (HSBC), Hong Kong, China
| | - Zhi-Feng Shi
- Hong Kong and Shanghai Brain Consortium (HSBC), Hong Kong, China.,Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, China
| | - Christine Haberler
- Division of Neuropathology and Neurochemistry, Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - Martina Deckert
- Institute of Neuropathology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Marco Timmer
- Laboratory for Neurooncology and Experimental Neurosurgery, Department of General Neurosurgery, Center for Neurosurgery, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Roland Goldbrunner
- Laboratory for Neurooncology and Experimental Neurosurgery, Department of General Neurosurgery, Center for Neurosurgery, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Arnault Tauziède-Espariat
- Department of Neuropathology, GHU Paris - Psychiatry and Neuroscience, Sainte-Anne Hospital, Paris, France.,Institut de Psychiatrie et Neurosciences de Paris (IPNP), UMR S1266, INSERM, IMA-BRAIN, Paris, France
| | - Pascale Varlet
- Department of Neuropathology, GHU Paris - Psychiatry and Neuroscience, Sainte-Anne Hospital, Paris, France.,Institut de Psychiatrie et Neurosciences de Paris (IPNP), UMR S1266, INSERM, IMA-BRAIN, Paris, France
| | - Sebastian Brandner
- Division of Neuropathology, National Hospital for Neurology and Neurosurgery, University College London Hospitals NHS Foundation Trust, Queen Square, London, UK.,Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, Queen Square, London, UK
| | | | - Matija Snuderl
- Department of Pathology, NYU Langone Medical Center, New York, NY, USA
| | - Kenneth Aldape
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Andrey Korshunov
- Department of Neuropathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany.,Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
| | - Olaf Witt
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany.,Clinical Cooperation Unit Pediatric Oncology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Pediatric Oncology, Hematology, Immunology and Pulmonology, University Hospital Heidelberg, Heidelberg, Germany.,National Center for Tumor Diseases (NCT), Heidelberg, Germany
| | - Christel Herold-Mende
- Division of Experimental Neurosurgery, Department of Neurosurgery, University Hospital Heidelberg, Heidelberg, Germany
| | - Andreas Unterberg
- Department of Neurosurgery, University Hospital of Heidelberg, Heidelberg, Germany
| | - Wolfgang Wick
- Clinical Cooperation Unit Neurooncology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Neurology and Neurooncology Program, National Center for Tumor Diseases (NCT), Heidelberg University Hospital, Heidelberg, Germany
| | - Stefan M Pfister
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany.,Division of Pediatric Neurooncology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany.,Department of Pediatric Oncology, Hematology, Immunology and Pulmonology, University Hospital Heidelberg, Heidelberg, Germany.,National Center for Tumor Diseases (NCT), Heidelberg, Germany
| | - Andreas von Deimling
- Department of Neuropathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - David T W Jones
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany.,Division of Pediatric Glioma Research, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Felix Sahm
- Department of Neuropathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany.,Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany.,Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany.,National Center for Tumor Diseases (NCT), Heidelberg, Germany
| | - Philipp Sievers
- Department of Neuropathology, Institute of Pathology, University Hospital Heidelberg, Heidelberg, Germany. .,Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany.
| |
Collapse
|
4
|
Maier AD, Meddis A, Mirian C, Haslund-Vinding J, Bartek J, Krog SM, Nguyen TUP, Areškevičiūtė A, Melchior LC, Heegaard S, Kristensen BW, Munch TN, Fugleholm K, Ziebell M, Raleigh DR, Poulsen FR, Gerds TA, Litman T, Scheie D, Mathiesen T. Gene expression analysis during progression of malignant meningioma compared to benign meningioma. J Neurosurg 2022; 138:1302-1312. [PMID: 36115056 DOI: 10.3171/2022.7.jns22585] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 03/12/2022] [Accepted: 07/22/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Meningioma is the most common primary intracranial neoplasm. Only 1%-3% of meningiomas are malignant according to the 2016 WHO criteria (WHO grade III). High-grade meningiomas present specific gene expression signatures indicating aggressive growth or recurrence. However, changes in gene expression and in neuroinflammatory gene expression signatures in WHO grade III meningiomas and during progression from WHO grade I or II to grade III are unknown. METHODS The authors used a NanoString targeted gene expression panel with focus on 787 genes relevant in meningioma pathology and neuroinflammatory pathways to investigate patients with grade III meningiomas treated at Rigshospitalet from 2000 to 2020 (n = 51). A temporal dimension was added to the investigation by including samples from patients' earlier grade I and II meningiomas and grade III recurrences (n = 139 meningiomas). The authors investigated changes in neuroinflammatory gene expression signatures in 1) grade I meningiomas that later transformed into grade III meningiomas, and 2) grade III meningiomas compared with nonrecurrent grade I meningiomas. RESULTS The authors' data indicate that FOXM1, TOP2A, BIRC5, and MYBL2 were enriched and the HOTAIR regulatory pathway was enriched in grade III meningiomas compared with nonrecurrent grade I meningiomas. They discovered a separation of malignant and benign meningiomas based only on genes involved in microglia regulation with enrichment of P2RY12 in grade I compared with grade III meningiomas. Interestingly, FOXM1 was upregulated in premalignant grade I meningioma years before the grade III transformation. CONCLUSIONS The authors found gene expression changes in low-grade meningiomas that predated histological transformation to grade III meningiomas. Neuroinflammation genes distinguished grade III from grade I meningiomas.
Collapse
Affiliation(s)
- Andrea D Maier
- Departments of1Neurosurgery and.,2Pathology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Alessandra Meddis
- 3Section of Biostatistics, University of Copenhagen, Copenhagen, Denmark
| | | | | | - Jiri Bartek
- Departments of1Neurosurgery and.,4Department of Neurosurgery, Karolinska University Hospital, Solna, Stockholm, Sweden.,5Department of Clinical Neuroscience, Karolinska Institutet, Solna, Stockholm, Sweden
| | - Sebastian M Krog
- 6Department of Oncology, Herlev Hospital, University of Copenhagen, Copenhagen, Denmark
| | | | - Aušrinė Areškevičiūtė
- 7Department of Pathology, Danish Reference Center for Prion Diseases, Copenhagen University Hospital, Copenhagen, Denmark
| | - Linea C Melchior
- 2Pathology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Steffen Heegaard
- 2Pathology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark.,8Department of Ophthalmology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Bjarne W Kristensen
- 9Department of Clinical Medicine and Biotech Research and Innovation Center (BRIC), University of Copenhagen, Copenhagen, Denmark.,10Department of Pathology, The Bartholin Institute, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Tina N Munch
- Departments of1Neurosurgery and.,11Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark.,17Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | | | | | - David R Raleigh
- Departments of12Neurological Surgery and.,13Radiation Oncology, University of California, San Francisco, California
| | - Frantz R Poulsen
- 14Department of Neurosurgery, Odense University Hospital, Odense, Denmark.,15Clinical Institute and BRIDGE, University of Southern Denmark, Odense, Denmark; and
| | - Thomas A Gerds
- 3Section of Biostatistics, University of Copenhagen, Copenhagen, Denmark
| | | | - David Scheie
- 2Pathology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Tiit Mathiesen
- Departments of1Neurosurgery and.,17Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| |
Collapse
|
5
|
Urbanska EM, Sørensen JB, Melchior LC, Costa JC, Santoni-Rugiu E. Durable Response to Combined Osimertinib and Pralsetinib Treatment for Osimertinib Resistance Due to Novel Intergenic ANK3-RET Fusion in EGFR-Mutated Non-Small-Cell Lung Cancer. JCO Precis Oncol 2022; 6:e2200040. [PMID: 35797511 PMCID: PMC9489192 DOI: 10.1200/po.22.00040] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Affiliation(s)
- Edyta M Urbanska
- Department of Oncology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Jens B Sørensen
- Department of Oncology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Linea C Melchior
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Junia C Costa
- Department of Radiology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Eric Santoni-Rugiu
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark.,Biotech Research & Innovation Center (BRIC), University of Copenhagen, Copenhagen, Denmark
| |
Collapse
|
6
|
Sehested A, Meade J, Scheie D, Østrup O, Bertelsen B, Misiakou MA, Sarosiek T, Kessler E, Melchior LC, Munch-Petersen HF, Pai RK, Schmuth M, Gottschling H, Zschocke J, Gallon R, Wimmer K. Constitutional POLE variants causing a phenotype reminiscent of constitutional mismatch repair deficiency. Hum Mutat 2022; 43:85-96. [PMID: 34816535 DOI: 10.1002/humu.24299] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 10/28/2021] [Accepted: 11/03/2021] [Indexed: 12/20/2022]
Abstract
Heterozygous POLE or POLD1 germline pathogenic variants (PVs) cause polymerase proofreading associated polyposis (PPAP), a constitutional polymerase proofreading deficiency that typically presents with colorectal adenomas and carcinomas in adulthood. Constitutional mismatch-repair deficiency (CMMRD), caused by germline bi-allelic PVs affecting one of four MMR genes, results in a high propensity for the hematological, brain, intestinal tract, and other malignancies in childhood. Nonmalignant clinical features, such as skin pigmentation alterations, are found in nearly all CMMRD patients and are important diagnostic markers. Here, we excluded CMMRD in three cancer patients with highly suspect clinical phenotypes but identified in each a constitutional heterozygous POLE PV. These, and two additional POLE PVs identified in published CMMRD-like patients, have not previously been reported as germline PVs despite all being well-known somatic mutations in hyper-mutated tumors. Together, these five cases show that specific POLE PVs may have a stronger "mutator" effect than known PPAP-associated POLE PVs and may cause a CMMRD-like phenotype distinct from PPAP. The common underlying mechanism, that is, a constitutional replication error repair defect, and a similar tumor spectrum provide a good rationale for monitoring these patients with a severe constitutional polymerase proofreading deficiency according to protocols proposed for CMMRD.
Collapse
Affiliation(s)
- Astrid Sehested
- Department of Pediatrics and Adolescent Medicine, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Julia Meade
- Division of Pediatric Hematology/Oncology, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - David Scheie
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Olga Østrup
- Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Birgitte Bertelsen
- Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Maria Anna Misiakou
- Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | | | - Elena Kessler
- Division of Pediatric Hematology/Oncology, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Linea C Melchior
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | | | - Reetesh K Pai
- Department of Pathology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | - Matthias Schmuth
- Department of Dermatology, Venereology and Allergy, Medical University of Innsbruck, Innsbruck, Austria
| | - Hendrik Gottschling
- Institute of Human Genetics, Medical University of Innsbruck, Innsbruck, Austria
| | - Johannes Zschocke
- Institute of Human Genetics, Medical University of Innsbruck, Innsbruck, Austria
| | - Richard Gallon
- Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK
| | - Katharina Wimmer
- Institute of Human Genetics, Medical University of Innsbruck, Innsbruck, Austria
| |
Collapse
|
7
|
Maier AD, Meddis A, Haslund-Vinding J, Mirian C, Areskeviciute A, Nguyen P, Westergaard C, Melchior LC, Munch TN, Skjøth-Rasmussen J, Poulsgaard L, Ziebell M, Bartek Jr J, Broholm H, Poulsen FR, Gerds TA, Scheie D, Mathiesen T. P04.05 Targeted Gene-Expression analysis during malignant transformation in primary and secondary malignant meningioma. Neuro Oncol 2021. [DOI: 10.1093/neuonc/noab180.062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
BACKGROUND
Malignant meningiomas comprise 2–5% of all meningiomas. The process of malignant transformation when benign meningiomas (WHO grade I-II) become malignant (WHO grade III) has not previously been investigated in sequential tumour surgeries. Upregulation of FOXM1 expression and DREAM-complex repression have shown phenotypical subgroups correlating with WHO grade and aggressiveness. We investigated the RNA expression of 30 genes central to meningioma biology and 770 genes involved in neuroinflammatory pathways in primary and secondary malignant meningioma patients who underwent one to several operations.
MATERIALS AND METHODS
We identified a cohort of consecutive malignant meningioma patients treated at Rigshospitalet, Copenhagen from 2000–2020 (n=51) and gathered their malignant tumours and previous WHO grade I/II tumours. The malignant cohort (MC) was counter matched with a benign cohort (BC) where patients had no recurrences during follow-up. RNA expression signatures from 140 samples from the MC and 51 samples from the BC were analysed with the Nanostring Neuroinflammation panel customized with 30 genes known to be relevant in meningioma phenotypes.
RESULTS
49% of MC patients had a previous grade I/II meningioma making them secondary malignant meningioma patients. Progression-free survival calculated from first malignant surgery to first recurrence or death showed no significant difference in the primary vs. secondary patients. Preliminary results of single-gene analysis of MC tumours showed FOXM1, MYBL2, TOP2A, BIRC5 expression was higher in WHO grade III samples. Gene-expression signatures in the individual patients and gene ontology enrichment analyses are in process.
CONCLUSIONS
FOXM1, MYBL2, TOP2A, BIRC5 RNA expression levels seem to rise during malignant progression across patients. Gene-expression analysis using the Nanostring technology is feasible and a potentially powerful tool to distinguish meningiomas prone to malignant transformation from truly benign meningiomas.
Collapse
Affiliation(s)
- A D Maier
- Rigshospitalet, Department of Neurosurgery, Copenhagen, Denmark
- Rigshospitalet, Department of Pathology, Copenhagen, Denmark
| | - A Meddis
- University of Copenhagen, Section of Biostatistics, Copenhagen, Denmark
| | | | - C Mirian
- Rigshospitalet, Department of Neurosurgery, Copenhagen, Denmark
| | - A Areskeviciute
- Rigshospitalet, Department of Pathology, Copenhagen, Denmark
| | - P Nguyen
- Rigshospitalet, Department of Pathology, Copenhagen, Denmark
| | - C Westergaard
- Rigshospitalet, Department of Pathology, Copenhagen, Denmark
| | - L C Melchior
- Rigshospitalet, Department of Pathology, Copenhagen, Denmark
| | - T N Munch
- Rigshospitalet, Department of Neurosurgery, Copenhagen, Denmark
- Statens Serum Institut, Department of Epidemiology Research, Copenhagen, Denmark
| | | | - L Poulsgaard
- Rigshospitalet, Department of Neurosurgery, Copenhagen, Denmark
| | - M Ziebell
- Rigshospitalet, Department of Neurosurgery, Copenhagen, Denmark
| | - J Bartek Jr
- Karolinska University Hospital, Department of Neurosurgery, Stockholm, Sweden
| | - H Broholm
- Rigshospitalet, Department of Pathology, Copenhagen, Denmark
| | - F R Poulsen
- Odense University Hospital, Department of Neurosurgery, Odense, Denmark
- University of Southern Denmark and BRIDGE, Clinical Institute, Odense, Denmark
| | - T A Gerds
- University of Copenhagen, Section of Biostatistics, Copenhagen, Denmark
| | - D Scheie
- Rigshospitalet, Department of Pathology, Copenhagen, Denmark
| | - T Mathiesen
- Rigshospitalet, Department of Neurosurgery, Copenhagen, Denmark
- University of Copenhagen, Institute of Clinical Medicine, Copenhagen, Denmark
| |
Collapse
|
8
|
Smith J, Faria CSAA, Qvist CC, Melchior LC, Lauridsen T. Prolonging fixation time of an alternative fixative to formalin for dermatological samples using standard laboratory protocols. J Clin Pathol 2020; 74:149-156. [PMID: 32669366 DOI: 10.1136/jclinpath-2020-206612] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/15/2020] [Accepted: 05/28/2020] [Indexed: 11/03/2022]
Abstract
AIMS Though formalin remains to be the gold standard fixative in pathology departments, analytical challenges persist for nucleic acid evaluations. In our laboratory, formalin fixation of skin samples in particular impairs diagnostic accuracy and demands repetition of biopsies and analytical procedures. PAXgene Tissue Systems may be an alternative; however, according to manufacturer specifications it only allows fixation for 48 hours before having to add a stabiliser. This may be a challenge in laboratories, which are closed in weekends and bank holidays. Our aim was to validate this alternative fixative for dermatological samples with prolonged fixation times using standard laboratory protocols developed for formalin-fixed specimens. We compared the results with gold standard formalin fixation. METHODS Skin specimens were formalin or PAXgene fixed for either 2 hours, 24 hours, 3 days or 7 days, paraffin-embedded, analysed and scored by observers. RESULTS Generally, formalin outperformed PAXgene fixation in H&E stains and fluorescence in situ hybridisation (FISH), but both seem usable for diagnostics. Time of PAXgene fixation did not have an impact on alcian blue-Van Gieson (ABVG), H&E (p=0.48), nor immunohistochemistry (p=0.74). There was a tendency towards best PAXgene performance at 24 hours of fixation for FISH, and for DNA integrity analysis 24 hours or 3 days. CONCLUSIONS Prolonging PAXgene fixation time to 3 days before adding stabiliser does not seem to have major impact on performance of general diagnostic analysis, but our preliminary results show optimisation of internal protocols are needed. PAXgene is an expensive alternative and may be confined to some dermatological samples.
Collapse
Affiliation(s)
- Julie Smith
- Department of Technology, Faculty of Health and Technology, University College Copenhagen, Copenhagen, Denmark
| | | | - Camilla Christine Qvist
- Department of Pathology, Copenhagen University Hospital (Rigshospitalet), Copenhagen, Denmark
| | - Linea C Melchior
- Department of Pathology, Copenhagen University Hospital (Rigshospitalet), Copenhagen, Denmark
| | - Thomas Lauridsen
- Department of Pathology, Copenhagen University Hospital (Rigshospitalet), Copenhagen, Denmark.,Department of Pathology, Zealand University Hospital, Roskilde, Denmark
| |
Collapse
|
9
|
Areškevičiūtė A, Broholm H, Melchior LC, Bartoletti-Stella A, Parchi P, Capellari S, Scheie D, Lund EL. Molecular Characterization of the Danish Prion Diseases Cohort With Special Emphasis on Rare and Unique Cases. J Neuropathol Exp Neurol 2020; 78:980-992. [PMID: 31553446 DOI: 10.1093/jnen/nlz089] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 07/03/2019] [Revised: 08/01/2019] [Indexed: 12/19/2022] Open
Abstract
The purpose of this study was to perform an updated reclassification of all definite prion disease cases with available fresh-frozen samples referred to the Danish Reference Center over the past 40 years, putting a special emphasis on the molecular characterization of novel disease subtypes. Investigation of the Danish prion diseases cohort revealed rare sporadic Creutzfeldt-Jakob disease cases with mixed subtypes and subtypes with previously uncharacterized white matter plaques, a new case of sporadic fatal insomnia, and 3 novel mutations, including 2 large octapeptide repeat insertions, and a point mutation in the prion protein gene. The evaluation of methionine and valine distribution at codon 129 among the prion disease patients in the cohort revealed the increased prevalence of methionine homozygotes compared to the general population. This observation was in line with the prevalence reported in other Caucasian prion disease cohort studies. Reclassification of the old prion diseases cohort revealed unique cases, the molecular characterization of which improves prion diseases classification, diagnostic accuracy, genetic counseling of affected families, and the understanding of disease biology.
Collapse
Affiliation(s)
- Aušrinė Areškevičiūtė
- Department of Pathology, Danish Reference Center for Prion Diseases, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; IRCCS Istituto delle Scienze Neurologiche di Bologna, Ospedale Bellaria, Bologna, Italy; Department of Experimental Diagnostic and Specialty Medicine; and Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy
| | - Helle Broholm
- Department of Pathology, Danish Reference Center for Prion Diseases, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; IRCCS Istituto delle Scienze Neurologiche di Bologna, Ospedale Bellaria, Bologna, Italy; Department of Experimental Diagnostic and Specialty Medicine; and Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy
| | - Linea C Melchior
- Department of Pathology, Danish Reference Center for Prion Diseases, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; IRCCS Istituto delle Scienze Neurologiche di Bologna, Ospedale Bellaria, Bologna, Italy; Department of Experimental Diagnostic and Specialty Medicine; and Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy
| | - Anna Bartoletti-Stella
- Department of Pathology, Danish Reference Center for Prion Diseases, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; IRCCS Istituto delle Scienze Neurologiche di Bologna, Ospedale Bellaria, Bologna, Italy; Department of Experimental Diagnostic and Specialty Medicine; and Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy
| | - Piero Parchi
- Department of Pathology, Danish Reference Center for Prion Diseases, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; IRCCS Istituto delle Scienze Neurologiche di Bologna, Ospedale Bellaria, Bologna, Italy; Department of Experimental Diagnostic and Specialty Medicine; and Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy
| | - Sabina Capellari
- Department of Pathology, Danish Reference Center for Prion Diseases, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; IRCCS Istituto delle Scienze Neurologiche di Bologna, Ospedale Bellaria, Bologna, Italy; Department of Experimental Diagnostic and Specialty Medicine; and Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy
| | - David Scheie
- Department of Pathology, Danish Reference Center for Prion Diseases, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; IRCCS Istituto delle Scienze Neurologiche di Bologna, Ospedale Bellaria, Bologna, Italy; Department of Experimental Diagnostic and Specialty Medicine; and Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy
| | - Eva L Lund
- Department of Pathology, Danish Reference Center for Prion Diseases, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark; IRCCS Istituto delle Scienze Neurologiche di Bologna, Ospedale Bellaria, Bologna, Italy; Department of Experimental Diagnostic and Specialty Medicine; and Department of Biomedical and Neuromotor Sciences, University of Bologna, Italy
| |
Collapse
|
10
|
Urbanska EM, Sørensen JB, Melchior LC, Costa JC, Santoni-Rugiu E. Changing ALK-TKI-Resistance Mechanisms in Rebiopsies of ALK-Rearranged NSCLC: ALK- and BRAF-Mutations Followed by Epithelial-Mesenchymal Transition. Int J Mol Sci 2020; 21:ijms21082847. [PMID: 32325863 PMCID: PMC7215933 DOI: 10.3390/ijms21082847] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 04/09/2020] [Accepted: 04/16/2020] [Indexed: 01/15/2023] Open
Abstract
Anaplastic lymphoma-kinase (ALK)-rearranged non-small cell lung cancer (NSCLC) is prone to developing heterogeneous, only partly known mechanisms of resistance to ALK-tyrosine-kinase-inhibitors (ALK-TKIs). We present a case of a 38-year old male, who never smoked with disseminated ALK-rearranged (EML4 (20) – ALK (20) fusion variant 2) lung adenocarcinoma, who received four sequentially different ALK-TKIs and two lines of chemotherapy in-between. We observed significant clinical benefit by the first three ALK-TKIs (Crizotinib, Ceritinib, Alectinib) and chemotherapy with Pemetrexed, resulting in overall survival over 3 years. Longitudinal assessment of progressions by rebiopsies from hepatic metastases showed different mechanisms of resistance to each ALK-TKI, including secondary ALK-mutations and the downstream p.V600E BRAF-mutation that had not been linked to second-generation ALK-TKIs before. Ultimately, in connection with terminal rapid progression and resistance to Alectinib and Lorlatinib, we identified phenotypical epithelial-mesenchymal transition (EMT) of newly occurred metastatic cells, a phenomenon not previously related to these two ALK-TKIs. This resistance heterogeneity suggests a continuously changing disease state. Sequential use of different generation’s ALK-TKIs and combination therapies may yield prolonged responses with satisfactory quality of life in patients with advanced ALK-positive NSCLC. However, the development of EMT is a major hurdle and may explain rapid disease progression and lack of response to continued ALK-inhibition.
Collapse
Affiliation(s)
- Edyta M. Urbanska
- Department of Oncology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark;
- Correspondence: (E.M.U.); (E.S.-R.)
| | - Jens B. Sørensen
- Department of Oncology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark;
| | - Linea C. Melchior
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark;
| | - Junia C. Costa
- Department of Radiology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark;
| | - Eric Santoni-Rugiu
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark;
- Biotech Research & Innovation Centre (BRIC), University of Copenhagen, DK-2200 Copenhagen, Denmark
- Correspondence: (E.M.U.); (E.S.-R.)
| |
Collapse
|
11
|
Vestrup Rift C, Melchior LC, Kovacevic B, Toxvaerd A, Klausen P, Karstensen JG, Kalaitzakis E, Storkholm J, Palnaes Hansen C, Vilmann P, Preuss Hasselby J. Next-generation sequencing of endoscopic ultrasound guided microbiopsies from pancreatic cystic neoplasms. Histopathology 2019; 75:767-771. [PMID: 31278869 DOI: 10.1111/his.13949] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 05/16/2019] [Accepted: 07/03/2019] [Indexed: 01/03/2023]
Abstract
AIMS Interpretation of cytology samples from pancreatic cysts is challenging. A novel microbiopsy forceps used during endoscopic ultrasound examinations offers new opportunities for histological examination of tissue from pancreatic cysts as well as next-generation sequencing. The aim of this study was to analyse the results of next-generation sequencing of microbiopsies from pancreatic cysts. METHODS AND RESULTS Microbiopsies from 27 patients were obtained, 23 of which were subjected to next-generation sequencing. Sixteen intraductal papillary mucinous neoplasms harboured mutations in genes regulating cell cycle and repair, and three were without mutations. Most frequent mutations were found in the KRAS and GNAS genes, and these were often concomitant. Three serous cystic neoplasms were without mutations, while with regard to histology, a non-diagnostic microbiopsy harboured a KRAS and a TP53 mutation and was deemed malignant after clinical follow-up. Three patients underwent surgery, and the point mutations detected in the microbiopsies were confirmed in the resected specimens. We identified one resected sample with an additional GNAS mutation which was not identified in the microbiopsy. CONCLUSIONS Next-generation sequencing of microbiopsies may have the potential to improve diagnostic decision-making.
Collapse
Affiliation(s)
- Charlotte Vestrup Rift
- Department of Pathology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Linea C Melchior
- Department of Pathology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Bojan Kovacevic
- Gastro Unit, Copenhagen University Hospital Herlev and Gentofte, Herlev, Denmark
| | - Anders Toxvaerd
- Department of Pathology, Copenhagen University Hospital Herlev and Gentofte, Herlev, Denmark
| | - Pia Klausen
- Gastro Unit, Copenhagen University Hospital Herlev and Gentofte, Herlev, Denmark
| | - John G Karstensen
- Gastro Unit, Copenhagen University Hospital Hvidovre, Hvidovre, Denmark
| | | | - Jan Storkholm
- Department of Surgery, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Carsten Palnaes Hansen
- Department of Surgery, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Peter Vilmann
- Gastro Unit, Copenhagen University Hospital Herlev and Gentofte, Herlev, Denmark
| | - Jane Preuss Hasselby
- Department of Pathology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| |
Collapse
|
12
|
Santoni-Rugiu E, Melchior LC, Urbanska EM, Jakobsen JN, Stricker KD, Grauslund M, Sørensen JB. Intrinsic resistance to EGFR-Tyrosine Kinase Inhibitors in EGFR-Mutant Non-Small Cell Lung Cancer: Differences and Similarities with Acquired Resistance. Cancers (Basel) 2019; 11:E923. [PMID: 31266248 PMCID: PMC6678669 DOI: 10.3390/cancers11070923] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 06/25/2019] [Accepted: 06/25/2019] [Indexed: 02/06/2023] Open
Abstract
Activating mutations in the epidermal growth factor receptor gene occur as early cancer-driving clonal events in a subset of patients with non-small cell lung cancer (NSCLC) and result in increased sensitivity to EGFR-tyrosine-kinase-inhibitors (EGFR-TKIs). Despite very frequent and often prolonged clinical response to EGFR-TKIs, virtually all advanced EGFR-mutated (EGFRM+) NSCLCs inevitably acquire resistance mechanisms and progress at some point during treatment. Additionally, 20-30% of patients do not respond or respond for a very short time (<3 months) because of intrinsic resistance. While several mechanisms of acquired EGFR-TKI-resistance have been determined by analyzing tumor specimens obtained at disease progression, the factors causing intrinsic TKI-resistance are less understood. However, recent comprehensive molecular-pathological profiling of advanced EGFRM+ NSCLC at baseline has illustrated the co-existence of multiple genetic, phenotypic, and functional mechanisms that may contribute to tumor progression and cause intrinsic TKI-resistance. Several of these mechanisms have been further corroborated by preclinical experiments. Intrinsic resistance can be caused by mechanisms inherent in EGFR or by EGFR-independent processes, including genetic, phenotypic or functional tumor changes. This comprehensive review describes the identified mechanisms connected with intrinsic EGFR-TKI-resistance and differences and similarities with acquired resistance and among clinically implemented EGFR-TKIs of different generations. Additionally, the review highlights the need for extensive pre-treatment molecular profiling of advanced NSCLC for identifying inherently TKI-resistant cases and designing potential combinatorial targeted strategies to treat them.
Collapse
Affiliation(s)
- Eric Santoni-Rugiu
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark.
| | - Linea C Melchior
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark
| | - Edyta M Urbanska
- Department of Oncology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark
| | - Jan N Jakobsen
- Department of Oncology and Palliative Units, Zealand University Hospital, DK-4700 Næstved, Denmark
| | - Karin de Stricker
- Department of Pathology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark
| | - Morten Grauslund
- Department of Clinical Genetics and Pathology, Skåne University Hospital, SE-221 85 Lund, Sweden
| | - Jens B Sørensen
- Department of Oncology, Rigshospitalet, Copenhagen University Hospital, DK-2100 Copenhagen, Denmark
| |
Collapse
|
13
|
Scheie D, Kufaishi HHA, Broholm H, Lund EL, de Stricker K, Melchior LC, Grauslund M. Biomarkers in tumors of the central nervous system - a review. APMIS 2019; 127:265-287. [PMID: 30740783 DOI: 10.1111/apm.12916] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 10/04/2018] [Accepted: 12/07/2018] [Indexed: 12/21/2022]
Abstract
Until recently, diagnostics of brain tumors were almost solely based on morphology and immunohistochemical stainings for relatively unspecific lineage markers. Although certain molecular markers have been known for longer than a decade (combined loss of chromosome 1p and 19q in oligodendrogliomas), molecular biomarkers were not included in the WHO scheme until 2016. Now, the classification of diffuse gliomas rests on an integration of morphology and molecular results. Also, for many other central nervous system tumor entities, specific diagnostic, prognostic and predictive biomarkers have been detected and continue to emerge. Previously, we considered brain tumors with similar histology to represent a single disease entity. We now realize that histologically identical tumors might show alterations in different molecular pathways, and often represent separate diseases with different natural history and response to treatment. Hence, knowledge about specific biomarkers is of great importance for individualized treatment and follow-up. In this paper we review the biomarkers that we currently use in the diagnostic work-up of brain tumors.
Collapse
Affiliation(s)
- David Scheie
- Department of Pathology, Rigshospitalet, Copenhagen, Denmark
| | | | - Helle Broholm
- Department of Pathology, Rigshospitalet, Copenhagen, Denmark
| | - Eva Løbner Lund
- Department of Pathology, Rigshospitalet, Copenhagen, Denmark
| | | | | | - Morten Grauslund
- Department of Genetics and Pathology, Laboratory Medicine, Lund, Sweden
| |
Collapse
|
14
|
Hyrcza MD, Andreasen S, Melchior LC, Tucker T, Heegaard S, White VA. Primary Secretory Carcinoma of the Lacrimal Gland: Report of a New Entity. Am J Ophthalmol 2018; 193:178-183. [PMID: 29963997 DOI: 10.1016/j.ajo.2018.06.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 06/13/2018] [Accepted: 06/20/2018] [Indexed: 02/04/2023]
Abstract
PURPOSE Secretory carcinoma has been described in the breast, salivary glands, skin, and other organs, but has not been reported in the lacrimal gland to date. Since lacrimal and salivary glands show similar tumors, we hypothesized that lacrimal secretory carcinoma may exist but has been misclassified in the past. DESIGN We undertook a retrospective review of all lacrimal gland tumors at 2 tertiary institutions with centralized ocular pathology practices. METHODS A total of 350 lacrimal tumors were reviewed by the authors. Candidate tumors were tested for ETV-NTRK rearrangement by fluorescence in situ hybridization and the presence of the translocation was confirmed by next-generation sequencing. RESULTS We identified a single case of secretory carcinoma. The diagnosis was confirmed by demonstrating specific immunohistochemical profile and the presence of ETV6-NTRK3 gene fusion, which is characteristic of secretory carcinoma of other sites. The tumor occurred in a young man who was treated with surgery alone with no recurrence during 12 years of follow-up. CONCLUSION Secretory carcinoma is a new lacrimal gland carcinoma type that should be added to the spectrum of low-grade lacrimal gland tumors.
Collapse
|
15
|
Andreasen S, Skálová A, Agaimy A, Bishop JA, Laco J, Leivo I, Franchi A, Larsen SR, Erentaite D, Ulhøi BP, von Buchwald C, Melchior LC, Michal M, Kiss K. ETV6 Gene Rearrangements Characterize a Morphologically Distinct Subset of Sinonasal Low-grade Non-intestinal-type Adenocarcinoma: A Novel Translocation-associated Carcinoma Restricted to the Sinonasal Tract. Am J Surg Pathol 2017; 41:1552-1560. [PMID: 28719468 DOI: 10.1097/pas.0000000000000912] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Low-grade sinonasal adenocarcinomas (low-grade SNACs) of the sinonasal tract comprise a poorly characterized and histologically heterogeneous group of tumors. We describe three cases of a histologically distinct variant of low-grade SNAC characterized by ETV6 gene rearrangements. The patients included 2 women (aged 32 and 88 y) and a man (aged 75 y); all were initially treated with surgery alone. Follow-up ranged from 9 to 170 months with one patient having 2 local recurrences and none experiencing distant or regional metastases. Tumors were composed of cytologically bland columnar and cuboidal eosinophilic tumor cells with basally located nuclei arranged in tubular and tubulotrabecular patterns. Immunohistochemically, CK7, DOG1, GCDFP-15, and SOX10 were positive in all cases, and vimentin was positive in 2 cases. Scattered single cells or small groups of tumor cells were S-100 positive. Only one case had weak, focal expression of GATA3, and mammaglobin was consistently negative. Two cases had ETV6-NTRK3 gene fusions, whereas ETV6 had an unknown fusion partner gene in one case. The highly similar morphology, immunohistochemical profile, and genetics of the presented cases are suggestive of a specific disease. Although translocation-associated adenocarcinomas in the sinonasal tract have previously been described exclusively as salivary-type carcinomas, we present the first type of carcinoma characterized by recurrent genetic rearrangements and distinct phenotype occurring exclusively in the sinonasal tract with no known major salivary gland counterpart. We provisionally designate this tumor ETV6-rearranged low-grade SNAC. Identification of additional cases is necessary to fully appreciate the morphologic and biological spectrum of this disease.
Collapse
Affiliation(s)
- Simon Andreasen
- Departments of *Otorhinolaryngology Head & Neck Surgery and Audiology ∥∥Pathology, Rigshospitalet, Copenhagen University Hospital, Copenhagen †Department of Otorhinolaryngology and Maxillofacial Surgery, Zealand University Hospital, Køge ††Department of Pathology, Odense University Hospital, Odense ‡‡Department of Pathology, Aalborg University Hospital, Aalborg §§Department of Pathology, Aarhus University Hospital, Aarhus, Denmark ‡Department of Pathology, Faculty of Medicine, Charles University, Pilsen ¶The Fingerland Department of Pathology, Charles University Faculty of Medicine and University Hospital Hradec Kralove, Hradec Kralove, Czech Republic §Institute of Pathology, University Hospital of Erlangen, Erlangen, Germany ∥Departments of Pathology, Otolaryngology, and Oncology, The Johns Hopkins Medical Institutions, Baltimore, MD #Department of Pathology and Forensic Medicine, University of Turku, Turku, Finland **Department of Surgery and Translational Medicine, Division of Anatomic Pathology, University of Florence, Florence, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Santoni-Rugiu E, Grauslund M, Melchior LC, Costa JC, Sørensen JB, Urbanska EM. Heterogeneous resistance mechanisms in an EGFR exon 19-mutated non-small cell lung cancer patient treated with erlotinib: Persistent FGFR3-mutation, localized transformation to EGFR-mutated SCLC, and acquired T790M EGFR-mutation. Lung Cancer 2017; 113:14-17. [PMID: 29110841 DOI: 10.1016/j.lungcan.2017.08.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 08/13/2017] [Accepted: 08/29/2017] [Indexed: 12/11/2022]
Abstract
Patients with epidermal growth factor receptor (EGFR) gene-mutated non-small cell lung cancer (NSCLC) obtain substantial clinical benefit from EGFR tyrosine-kinase inhibitors (TKIs), but will ultimately develop TKI-resistance resulting in median progression-free survival of 9-15 months during first-line TKI-therapy. However, type and timing of TKI-resistance cannot be predicted and several mechanisms may simultaneously/subsequently occur during TKI-treatment. In this respect, we present a 49 year-old Caucasian male ex-smoker with metastatic pulmonary adenocarcinoma (ADC) that concomitantly harbored an EGFR exon 19-mutation (p.E746_A750delELREA) and a previously unreported 2bp frame-shift microdeletion in the fibroblast growth factor receptor 3 (FGFR3; p.D785fs*31) gene. Interestingly, FGFR3-mutations have previously been described in other cancer types of Caucasian patients and may represent an alternative pathway to EGFR-signaling. The patient received first-line erlotinib but after only 7 weeks showed metastatic pleural effusion, in which transformation to small cell lung cancer (SCLC) that retained the EGFR- and FGFR3-mutations was identified. Consequently, standard carboplatin-etoposide regimen for SCLC combined with erlotinib continuation was implemented obtaining significant objective response. However, after completing 6 cycles of this combination, new pulmonary and hepatic metastases appeared and showed persistence of the original EGFR- and FGFR3-mutated ADC phenotype together with acquisition of the erlotinib-resistant T790M EGFR-mutation. The patient rapidly deteriorated and deceased. Thus, this advanced EGFR-mutated NSCLC displayed very rapid onset and heterogeneous genetic and phenotypic mechanisms of TKI-resistance occurring at different times and locations of metastatic disease: concomitant FGFR3-mutation before and during TKI-treatment as potential intrinsic mechanism for the rapid progression; transformation to SCLC at first progression during TKI-therapy; acquired T790M EGFR-mutation at second progression. Our case also underlines that, when achievable, rebiopsies of progressive sites during TKI-treatment are important for identifying heterogeneous histopathological and molecular resistance mechanisms and better defining possible treatment modifications.
Collapse
Affiliation(s)
- Eric Santoni-Rugiu
- Department of Pathology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
| | - Morten Grauslund
- Department of Pathology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
| | - Linea C Melchior
- Department of Pathology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
| | - Junia C Costa
- Department of Radiology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
| | - Jens B Sørensen
- Department of Oncology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
| | - Edyta M Urbanska
- Department of Oncology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.
| |
Collapse
|
17
|
Rossing HH, Grauslund M, Urbanska EM, Melchior LC, Rask CK, Costa JC, Skov BG, Sørensen JB, Santoni-Rugiu E. Concomitant occurrence of EGFR (epidermal growth factor receptor) and KRAS (V-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog) mutations in an ALK (anaplastic lymphoma kinase)-positive lung adenocarcinoma patient with acquired resistance to crizotinib: a case report. BMC Res Notes 2013; 6:489. [PMID: 24279718 PMCID: PMC3879082 DOI: 10.1186/1756-0500-6-489] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Accepted: 11/08/2013] [Indexed: 11/24/2022] Open
Abstract
Background Anaplastic lymphoma kinase-positive non-small cell lung carcinoma patients are generally highly responsive to the dual anaplastic lymphoma kinase and MET tyrosine kinase inhibitor crizotinib. However, they eventually acquire resistance to this drug, preventing the anaplastic lymphoma kinase inhibitors from having a prolonged beneficial effect. The molecular mechanisms responsible for crizotinib resistance are beginning to emerge, e.g., in some anaplastic lymphoma kinase-positive non-small cell lung carcinomas the development of secondary mutations in this gene has been described. However, the events behind crizotinib-resistance currently remain largely uncharacterized. Thus, we report on an anaplastic lymphoma kinase-positive non-small cell lung carcinoma patient with concomitant occurrence of epidermal growth factor receptor and V-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog mutations upon development of crizotinib-resistance. Case presentation A 61-year-old Caucasian never-smoking male was diagnosed with anaplastic lymphoma kinase -positive pulmonary adenocarcinoma, stage T4N3M1b. Treatment with crizotinib initially resulted in complete objective response in the thorax and partial response in the abdomen, but after 8 months of therapy the patient acquired resistance and progressed. Biopsies from new metastases revealed development of epidermal growth factor receptor and V-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog mutations concomitant with the original anaplastic lymphoma kinase gene rearrangement and without signs of anaplastic lymphoma kinase fusion gene amplification or secondary anaplastic lymphoma kinase mutations. Conclusion To our knowledge, this is the first report of an anaplastic lymphoma kinase-positive pulmonary adenocarcinoma, which upon emergence of crizotinib resistance acquired 2 new somatic mutations in the epidermal growth factor receptor and V-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog genes, respectively, concomitant with the original anaplastic lymphoma kinase rearrangement. Thus, these 3 driver mutations, usually considered mutually exclusive, may coexist in advanced non-small cell lung carcinoma that becomes resistant to crizotinib, presumably because heterogeneous tumor clones utilize epidermal growth factor receptor and/or V-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog signaling to circumvent the inhibition of anaplastic lymphoma kinase-mediated signaling by crizotinib. The identification of new targetable somatic mutations by tumor re-biopsy may help clarify the mechanism behind the development of the acquired crizotinib resistance and pave the way for combined strategies involving multiple targeted therapies.
Collapse
Affiliation(s)
- Henrik H Rossing
- Laboratory of Molecular Pathology, Department of Pathology, Rigshospitalet, Copenhagen University Hospital, 9 Blegdamsvej, 2100 Copenhagen, Denmark.
| | | | | | | | | | | | | | | | | |
Collapse
|