. 2017 Nov 16;171(5):1042-1056.e10.

doi: 10.1016/j.cell.2017.09.048. Epub 2017 Oct 19.

Comprehensive Analysis of Hypermutation in Human Cancer

Brittany B Campbell¹, Nicholas Light², David Fabrizio³, Matthew Zatzman⁴, Fabio Fuligni⁵, Richard de Borja⁵, Scott Davidson⁶, Melissa Edwards⁵, Julia A Elvin³, Karl P Hodel⁷, Walter J Zahurancik⁸, Zucai Suo⁸, Tatiana Lipman⁵, Katharina Wimmer⁹, Christian P Kratz¹⁰, Daniel C Bowers¹¹, Theodore W Laetsch¹¹, Gavin P Dunn¹², Tanner M Johanns¹³, Matthew R Grimmer¹⁴, Ivan V Smirnov¹⁵, Valérie Larouche¹⁶, David Samuel¹⁷, Annika Bronsema¹⁸, Michael Osborn¹⁹, Duncan Stearns²⁰, Pichai Raman²¹, Kristina A Cole²¹, Phillip B Storm²², Michal Yalon²³, Enrico Opocher²⁴, Gary Mason²⁵, Gregory A Thomas²⁶, Magnus Sabel²⁷, Ben George²⁸, David S Ziegler²⁹, Scott Lindhorst³⁰, Vanan Magimairajan Issai³¹, Shlomi Constantini³², Helen Toledano³², Ronit Elhasid³³, Roula Farah³⁴, Rina Dvir³⁵, Peter Dirks³⁶, Annie Huang³⁷, Melissa A Galati⁵, Jiil Chung⁵, Vijay Ramaswamy³⁸, Meredith S Irwin³⁸, Melyssa Aronson³⁹, Carol Durno⁴⁰, Michael D Taylor³⁶, Gideon Rechavi⁴¹, John M Maris²¹, Eric Bouffet³⁸, Cynthia Hawkins⁴², Joseph F Costello⁴³, M Stephen Meyn⁴⁴, Zachary F Pursell⁷, David Malkin⁴⁵, Uri Tabori⁴⁶, Adam Shlien⁴⁷

Affiliations

¹ Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada; The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, ON, Canada; Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
² Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada; Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
³ Foundation Medicine, Inc., Cambridge, MA, USA.
⁴ Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada.
⁵ Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada.
⁶ Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada; Department of Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, ON, Canada.
⁷ Department of Biochemistry and Molecular Biology, Tulane Cancer Center, Tulane University School of Medicine, New Orleans, LA, USA.
⁸ The Ohio State Biochemistry Program, The Ohio State University, Columbus, OH, USA; Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA.
⁹ Division of Human Genetics, Medical University Innsbruck, Innsbruck, Austria.
¹⁰ Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany.
¹¹ Department of Pediatrics and Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX, USA; Pauline Allen Gill Center for Cancer and Blood Disorders, Children's Health, Dallas, TX, USA.
¹² Department of Neurological Surgery, Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO, USA.
¹³ Department of Neurological Surgery, Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO, USA; Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA.
¹⁴ Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA.
¹⁵ Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA; Division of Neuroepidemiology, Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA.
¹⁶ Department of Pediatrics, Centre Mère-enfant Soleil du CHU de Québec, CRCHU de Québec, Université Laval, Quebec City, QC, Canada.
¹⁷ Department of Hematology-Oncology, Valley Children's Hospital, Madera, CA, USA.
¹⁸ Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
¹⁹ Department of Haematology and Oncology, Women's and Children's Hospital, North Adelaide, SA, Australia.
²⁰ Department of Pediatrics-Hematology and Oncology, UH Rainbow Babies and Children's Hospital, Cleveland, OH, USA.
²¹ Division of Oncology and Center for Childhood Cancer Research, Children's Hospital of Philadelphia, Philadelphia, PA, USA; Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
²² Division of Neurosurgery, Children's Hospital of Philadelphia, Philadelphia, PA, USA.
²³ Department of Pediatric Hematology-Oncology, Sheba Medical Center, Tel Hashomer, Israel.
²⁴ Pediatric Oncology & Hematology, Azienda Ospedaliera-Università degli Studi di Padova, Via Giustiniani n.1, Padova, Italy.
²⁵ Department of Pediatric Hematology-Oncology, Children's Hospital of Pittsburgh of UPMC, Pittsburgh, PA, USA.
²⁶ Division of Pediatric Hematology-Oncology, Oregon Health & Science University, Portland, OR, USA.
²⁷ Department of Pediatrics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg & Queen Silvia Children's Hospital, Sahlgrenska University Hospital, Gothenburg, Sweden.
²⁸ Division of Hematology and Oncology, Medical College of Wisconsin, Milwaukee, WI, USA.
²⁹ Kids Cancer Centre, Sydney Children's Hospital, Randwick, NSW, Australia; Children's Cancer Institute, Lowy Cancer Research Centre, University of New South Wales, Randwick, NSW, Australia.
³⁰ Neuro-Oncology, Department of Neurosurgery, and Department of Medicine, Division of Hematology/Medical Oncology, Medical University of South Carolina, Charleston, SC, USA.
³¹ Department of Pediatric Hematology-Oncology, Cancer Care Manitoba; Research Institute in Oncology and Hematology (RIOH), University of Manitoba, Winnipeg, MB, Canada.
³² Department of Pediatric Neurosurgery, Tel Aviv Sourasky Medical Center, Tel Aviv University, Tel Aviv, Israel.
³³ Department of Hematology-Oncology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.
³⁴ Department of Pediatrics, Saint George Hospital University Medical Center, Beirut, Lebanon.
³⁵ Department of Pediatric Hematology/Oncology, Schneider Children's Medical Center of Israel, Petach Tikva, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
³⁶ Department of Neurosurgery, The Hospital for Sick Children, Toronto, ON, Canada.
³⁷ The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, ON, Canada; Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, ON, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada.
³⁸ Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, ON, Canada.
³⁹ Zane Cohen Centre for Digestive Diseases, Mount Sinai Hospital, Toronto, ON, Canada.
⁴⁰ Zane Cohen Centre for Digestive Diseases, Mount Sinai Hospital, Toronto, ON, Canada; Division of Gastroenterology, Hepatology and Nutrition, The Hospital for Sick Children, Toronto, ON, Canada.
⁴¹ Cancer Research Center and Wohl Institute for Translational Medicine, Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel.
⁴² The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, ON, Canada.
⁴³ Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA.
⁴⁴ Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada; Center for Human Genomics and Precision Medicine, University of Wisconsin, Madison, WI, USA.
⁴⁵ Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, ON, Canada; Department of Pediatrics, University of Toronto, Toronto, ON, Canada.
⁴⁶ Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada; The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, ON, Canada; Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, ON, Canada. Electronic address: uri.tabori@sickkids.ca.
⁴⁷ Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada; Department of Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, ON, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada. Electronic address: adam.shlien@sickkids.ca.

PMID: 29056344
PMCID: PMC5849393
DOI: 10.1016/j.cell.2017.09.048

Comprehensive Analysis of Hypermutation in Human Cancer

Brittany B Campbell et al. Cell. 2017.

. 2017 Nov 16;171(5):1042-1056.e10.

doi: 10.1016/j.cell.2017.09.048. Epub 2017 Oct 19.

Authors

Affiliations

¹ Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada; The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, ON, Canada; Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
² Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada; Institute of Medical Science, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
³ Foundation Medicine, Inc., Cambridge, MA, USA.
⁴ Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada.
⁵ Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada.
⁶ Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada; Department of Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, ON, Canada.
⁷ Department of Biochemistry and Molecular Biology, Tulane Cancer Center, Tulane University School of Medicine, New Orleans, LA, USA.
⁸ The Ohio State Biochemistry Program, The Ohio State University, Columbus, OH, USA; Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA.
⁹ Division of Human Genetics, Medical University Innsbruck, Innsbruck, Austria.
¹⁰ Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany.
¹¹ Department of Pediatrics and Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX, USA; Pauline Allen Gill Center for Cancer and Blood Disorders, Children's Health, Dallas, TX, USA.
¹² Department of Neurological Surgery, Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO, USA.
¹³ Department of Neurological Surgery, Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO, USA; Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA.
¹⁴ Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA.
¹⁵ Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA; Division of Neuroepidemiology, Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA.
¹⁶ Department of Pediatrics, Centre Mère-enfant Soleil du CHU de Québec, CRCHU de Québec, Université Laval, Quebec City, QC, Canada.
¹⁷ Department of Hematology-Oncology, Valley Children's Hospital, Madera, CA, USA.
¹⁸ Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
¹⁹ Department of Haematology and Oncology, Women's and Children's Hospital, North Adelaide, SA, Australia.
²⁰ Department of Pediatrics-Hematology and Oncology, UH Rainbow Babies and Children's Hospital, Cleveland, OH, USA.
²¹ Division of Oncology and Center for Childhood Cancer Research, Children's Hospital of Philadelphia, Philadelphia, PA, USA; Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
²² Division of Neurosurgery, Children's Hospital of Philadelphia, Philadelphia, PA, USA.
²³ Department of Pediatric Hematology-Oncology, Sheba Medical Center, Tel Hashomer, Israel.
²⁴ Pediatric Oncology & Hematology, Azienda Ospedaliera-Università degli Studi di Padova, Via Giustiniani n.1, Padova, Italy.
²⁵ Department of Pediatric Hematology-Oncology, Children's Hospital of Pittsburgh of UPMC, Pittsburgh, PA, USA.
²⁶ Division of Pediatric Hematology-Oncology, Oregon Health & Science University, Portland, OR, USA.
²⁷ Department of Pediatrics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg & Queen Silvia Children's Hospital, Sahlgrenska University Hospital, Gothenburg, Sweden.
²⁸ Division of Hematology and Oncology, Medical College of Wisconsin, Milwaukee, WI, USA.
²⁹ Kids Cancer Centre, Sydney Children's Hospital, Randwick, NSW, Australia; Children's Cancer Institute, Lowy Cancer Research Centre, University of New South Wales, Randwick, NSW, Australia.
³⁰ Neuro-Oncology, Department of Neurosurgery, and Department of Medicine, Division of Hematology/Medical Oncology, Medical University of South Carolina, Charleston, SC, USA.
³¹ Department of Pediatric Hematology-Oncology, Cancer Care Manitoba; Research Institute in Oncology and Hematology (RIOH), University of Manitoba, Winnipeg, MB, Canada.
³² Department of Pediatric Neurosurgery, Tel Aviv Sourasky Medical Center, Tel Aviv University, Tel Aviv, Israel.
³³ Department of Hematology-Oncology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.
³⁴ Department of Pediatrics, Saint George Hospital University Medical Center, Beirut, Lebanon.
³⁵ Department of Pediatric Hematology/Oncology, Schneider Children's Medical Center of Israel, Petach Tikva, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
³⁶ Department of Neurosurgery, The Hospital for Sick Children, Toronto, ON, Canada.
³⁷ The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, ON, Canada; Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, ON, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada.
³⁸ Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, ON, Canada.
³⁹ Zane Cohen Centre for Digestive Diseases, Mount Sinai Hospital, Toronto, ON, Canada.
⁴⁰ Zane Cohen Centre for Digestive Diseases, Mount Sinai Hospital, Toronto, ON, Canada; Division of Gastroenterology, Hepatology and Nutrition, The Hospital for Sick Children, Toronto, ON, Canada.
⁴¹ Cancer Research Center and Wohl Institute for Translational Medicine, Sheba Medical Center, Tel Hashomer, Ramat Gan, Israel.
⁴² The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, ON, Canada.
⁴³ Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA.
⁴⁴ Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada; Center for Human Genomics and Precision Medicine, University of Wisconsin, Madison, WI, USA.
⁴⁵ Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, ON, Canada; Department of Pediatrics, University of Toronto, Toronto, ON, Canada.
⁴⁶ Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada; The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, ON, Canada; Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, ON, Canada. Electronic address: uri.tabori@sickkids.ca.
⁴⁷ Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, Canada; Department of Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, ON, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada. Electronic address: adam.shlien@sickkids.ca.

PMID: 29056344
PMCID: PMC5849393
DOI: 10.1016/j.cell.2017.09.048

Abstract

We present an extensive assessment of mutation burden through sequencing analysis of >81,000 tumors from pediatric and adult patients, including tumors with hypermutation caused by chemotherapy, carcinogens, or germline alterations. Hypermutation was detected in tumor types not previously associated with high mutation burden. Replication repair deficiency was a major contributing factor. We uncovered new driver mutations in the replication-repair-associated DNA polymerases and a distinct impact of microsatellite instability and replication repair deficiency on the scale of mutation load. Unbiased clustering, based on mutational context, revealed clinically relevant subgroups regardless of the tumors' tissue of origin, highlighting similarities in evolutionary dynamics leading to hypermutation. Mutagens, such as UV light, were implicated in unexpected cancers, including sarcomas and lung tumors. The order of mutational signatures identified previous treatment and germline replication repair deficiency, which improved management of patients and families. These data will inform tumor classification, genetic testing, and clinical trial design.

Keywords: DNA repair; DNA replication; cancer genomics; cancer predisposition; hypermutation; immune checkpoint inhibitors; mismatch repair; mutator.

PubMed Disclaimer

Figures

**Figure 1. The Landscape of Hypermutation across 81,337 Pediatric and Adult Cancers**
(A) Mutation burden for 2,885 pediatric cancers. ≥ 10 mut/Mb = hypermutant; ≥ 100 mut/Mb = ultra-hypermutant. (B) Hypermutation pediatric cohort by tumor type. The pie chart depicts the proportion of tumors with mutations in replication repair genes (*MSH2*, *MLH1*, *MSH6*, *PMS2 POLE*, and *POLD1*). (C) Mutation burden range for 78,452 adult tumors with breakdown by tumor type. (D) Tumor types that show enrichment for MSI-MSI-H tumors cluster in the 10–100 Mut/Mb range, while tumors with mismatch repair and polymerase proofreading in the same types are ultrahypermutant. (E) Proportion of ultra-hypermutant, hypermutant, and lowly mutated tumors, and their correlation with MSI-H and MMR/POL mutations. GI, gastrointestinal; AML, acute myeloid leukemia; NBL, neuroblastoma; RMS, rhabdomyosarcoma; STS, soft tissue sarcoma; OS, osteosarcoma; EWS, Ewing sarcoma; WLMS, Wilm's tumor; RCC, renal cell carcinoma; NP&PNS, nasopharynx and paranasal sinuses undifferentiated carcinoma; and MM&MDS, mutiple myeloma and myelodysplastic syndrome. See also Figures S1 and S2 and Table S1.

**Figure 2. Characterization of Known and Novel POLE and POLD1 Drivers**
(A) Examples of tumors with three or more *POLE/POLD1* mutations. Other tumors found in the entire dataset harboring the same mutations shown below (gray bars represent individual tumors and their burden is shown on the y axis). No bars indicate no other tumors identified with this mutation. One clear driver emerges in each tumor. (B) Landscape of drivers (top) and passengers (bottom) in *POLE* and *POLD1*. Green circles, previously known drivers; yellow circles, novel drivers, first described here. (C) Codons in *POLE* with driver mutations, indicating whether they are sensitive to amino acid changes. Invariable codons are those at which only one amino acid change was detected. Insensitive codons are those in which the mutation burden was high, regardless of amino acid change. Sensitive codons are those in which certain amino acid changes would abrogate the mutator effect. Green, yellow, and red bars represent strong, moderate, and weak mutation burden phenotypes, respectively. (D) All tumors harboring *POLE* and *POLD1* mutations by tumor type. Green, *POLE* driver; yellow, *POLD1* driver; and gray, passenger mutation. See also Figure S3 and Tables S2 and S3.

**Figure 3. Unsupervised Clustering by Trinucleotide Context Reveals Mutational Etiology of Hypermutant Tumors**
(A) Top: Hierarchical clustering of 1,521 tumors by trinucleotide context reveals 8 major clusters. Middle: Disease type, MSI status. Bottom: Heatmap colored by proportion of mutations from each class of mutational signatures. (B) Top: Range of tumors types found in clusters C1, C2, and C3, size of circle indicates number of tumors. Middle: Boxplots displaying mutation burden. Bottom: Proportion of tumors in each cluster that are MSI-high, *POLE* mutant, and arising in children, respectively. (C) Average proportion of mutations attributed by 4 mutational signature classes, tobacco smoke (signature 4), alkylating agents (signature 11), UV Light (signature 7), and APOBEC (signatures 2 and 13). Color of circles indicates the cluster that tumors belong to; size indicates the number of tumors in this cluster and tumor type; and the y axis indicates the average proportion of mutations attributed to each signature. See also Figure S4 and Table S4.

**Figure 4. Clustering Identifies Tumors with Differences in Evolutionary Dynamics and Survival**
(A) Histograms with number of single-nucleotide variants (SNVs) by variant allele fraction (VAF) in each of the 8 major clusters (Figure 3). Colors indicate the functional impact of a SNV. (B) VAF versus median cumulative mutation burden plotted for each of the 3 replication repair clusters. C1 tumors exhibit an early burst of mutations (∼0.4 VAF) with a second burst of mutations later in tumor evolution (∼0.2 VAF). C3 tumors display a single burst of mutations ∼0.2 VAF, and C2 tumors exhibit a more gradual accumulation of mutations throughout their evolution. (C) Kaplan-Meier plot of overall survival for tumors with mutational signatures consistent with clusters 1, 2, or 3. Cluster 3, n = 27. Cluster 2, n = 168. Cluster 1, n = 22. p < 0.0001.

**Figure 5. Mutational Context in Hypermutant Tumors Determined by Timing and Etiology of Mutation**
(A) Left: Average proportion of mutations by trinucleotide context in exomes with known germline status/treatment history. Right: Same, but from panel sequencing. Germline status and treatment history unknown. N indicates the number of tumor samples. (B) Example mutational signatures in exomes from tumors with known germline status/treatment history. (C–F) Examples of subclonal mutational signatures determined from allelic read depth on panel sequencing data. (C) Subclonal mutational signatures in an adult colorectal carcinoma with somatic *POLE* mutation. (D) Subclonal mutational signatures in a pediatric glioblastoma. (E) Mutational signatures present in subclonal clusters of mutations in a lung adenocarcinoma. (F) Mutational signatures present in 3 subclonal clusters of mutations in skin melanoma. See also Table S5.

**Figure 6. Confirmation of Cancer Predisposition Syndrome and Clinical Interventions following Tumor-Only Panel Sequencing**
(A) Procedure for diagnosing cancer predisposition syndrome via tumor-only panel sequencing. Sequencing results with high-tumor-mutation burden, a driver mutation in a replication repair gene, and signatures of replication repair deficiency are specific for CMMRD. Clinical interventions include surveillance and immune checkpoint inhibition therapy for active tumors. (B) Left: 15 patients for which only panel sequencing was performed prior to confirmation of predisposition syndrome diagnosis. Blue squares, signatures of MMR and the subsequent identification of a germline mutation in an MMR gene. Orange, same for *POLE*. Right: Example of a brain tumor found via surveillance. Bottom right: Colorectal cancer responding to anti-PD1 therapy after confirmation of germline MMR mutation. See also Figure S5.

See this image and copyright information in PMC

Comment in

Cancer genomics: The driving force of cancer evolution.
Koch L. Koch L. Nat Rev Genet. 2017 Dec;18(12):703. doi: 10.1038/nrg.2017.95. Epub 2017 Nov 7. Nat Rev Genet. 2017. PMID: 29109522 No abstract available.
Everybody In! No Bouncers at Tumor Gates.
Vitale I, Galluzzi L. Vitale I, et al. Trends Genet. 2018 Feb;34(2):85-87. doi: 10.1016/j.tig.2017.12.006. Epub 2017 Dec 23. Trends Genet. 2018. PMID: 29277455

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Comprehensive Analysis of Hypermutation in Human Cancer

Affiliations

Comprehensive Analysis of Hypermutation in Human Cancer

Authors

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Abstract

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