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. 2022 Oct 1;20(1):36.
doi: 10.1186/s13053-022-00241-1.

Colorectal cancer incidences in Lynch syndrome: a comparison of results from the prospective lynch syndrome database and the international mismatch repair consortium

Pål Møller  1 Toni Seppälä  2   3   4 James G Dowty  5 Saskia Haupt  6   7 Mev Dominguez-Valentin  8 Lone Sunde  9   10 Inge Bernstein  11   12 Christoph Engel  13 Stefan Aretz  14 Maartje Nielsen  15 Gabriel Capella  16 Dafydd Gareth Evans  17 John Burn  18 Elke Holinski-Feder  19   20 Lucio Bertario  21 Bernardo Bonanni  21 Annika Lindblom  22 Zohar Levi  23 Finlay Macrae  24   25 Ingrid Winship  24   25 John-Paul Plazzer  26 Rolf Sijmons  27 Luigi Laghi  28 Adriana Della Valle  29 Karl Heinimann  30 Elizabeth Half  31 Francisco Lopez-Koestner  32 Karin Alvarez-Valenzuela  32 Rodney J Scott  33 Lior Katz  34 Ido Laish  35 Elez Vainer  34 Carlos Alberto Vaccaro  36 Dirce Maria Carraro  37 Nathan Gluck  38 Naim Abu-Freha  39 Aine Stakelum  40 Rory Kennelly  40 Des Winter  40 Benedito Mauro Rossi  41 Marc Greenblatt  42 Mabel Bohorquez  43 Harsh Sheth  44 Maria Grazia Tibiletti  45 Leonardo S Lino-Silva  46 Karoline Horisberger  47 Carmen Portenkirchner  47 Ivana Nascimento  48 Norma Teresa Rossi  49 Leandro Apolinário da Silva  50 Huw Thomas  51 Attila Zaránd  52 Jukka-Pekka Mecklin  53   54 Kirsi Pylvänäinen  55 Laura Renkonen-Sinisalo  2   3 Anna Lepisto  2   3 Päivi Peltomäki  56 Christina Therkildsen  57 Lars Joachim Lindberg  57 Ole Thorlacius-Ussing  11   12 Magnus von Knebel Doeberitz  58   59 Markus Loeffler  60 Nils Rahner  61 Verena Steinke-Lange  19   20 Wolff Schmiegel  62 Deepak Vangala  62 Claudia Perne  14 Robert Hüneburg  63 Aída Falcón de Vargas  64   65 Andrew Latchford  66 Anne-Marie Gerdes  67 Ann-Sofie Backman  68 Carmen Guillén-Ponce  69 Carrie Snyder  70 Charlotte K Lautrup  9 David Amor  71 Edenir Palmero  72   73 Elena Stoffel  74 Floor Duijkers  75 Michael J Hall  76 Heather Hampel  77 Heinric Williams  78 Henrik Okkels  79 Jan Lubiński  80 Jeanette Reece  5 Joanne Ngeow  81 Jose G Guillem  82 Julie Arnold  83 Karin Wadt  67 Kevin Monahan  84 Leigha Senter  85 Lene J Rasmussen  86 Liselotte P van Hest  87 Luigi Ricciardiello  88 Maija R J Kohonen-Corish  89 Marjolijn J L Ligtenberg  90 Melissa Southey  91 Melyssa Aronson  92 Mohd N Zahary  93 N Jewel Samadder  94 Nicola Poplawski  95   96 Nicoline Hoogerbrugge  97 Patrick J Morrison  98 Paul James  99 Grant Lee  100 Rakefet Chen-Shtoyerman  101 Ravindran Ankathil  102 Rish Pai  103 Robyn Ward  104 Susan Parry  83 Tadeusz Dębniak  105 Thomas John  106 Thomas van Overeem Hansen  67 Trinidad Caldés  107 Tatsuro Yamaguchi  108 Verónica Barca-Tierno  109 Pilar Garre  107 Giulia Martina Cavestro  110 Jürgen Weitz  111 Silke Redler  61 Reinhard Büttner  112 Vincent Heuveline  6 John L Hopper  5 Aung Ko Win  5 Noralane Lindor  113 Steven Gallinger  114 Loïc Le Marchand  115 Polly A Newcomb  116 Jane Figueiredo  116 Daniel D Buchanan  117   118   119 Stephen N Thibodeau  120 Sanne W Ten Broeke  121 Eivind Hovig  8   122 Sigve Nakken  8   123 Marta Pineda  16 Nuria Dueñas  16 Joan Brunet  16 Kate Green  17 Fiona Lalloo  17 Katie Newton  124 Emma J Crosbie  125   126 Miriam Mints  127 Douglas Tjandra  24   25 Florencia Neffa  29 Patricia Esperon  29 Revital Kariv  38 Guy Rosner  38 Walter Hernán Pavicic  36   128 Pablo Kalfayan  36 Giovana Tardin Torrezan  37 Thiago Bassaneze  41 Claudia Martin  50 Gabriela Moslein  129 Aysel Ahadova  58 Matthias Kloor  58 Julian R Sampson  130 Mark A Jenkins  5 European Hereditary Tumour Group (EHTG) and the International Mismatch Repair Consortium (IMRC)
Affiliations

Colorectal cancer incidences in Lynch syndrome: a comparison of results from the prospective lynch syndrome database and the international mismatch repair consortium

Pål Møller et al. Hered Cancer Clin Pract. .

Abstract

Objective: To compare colorectal cancer (CRC) incidences in carriers of pathogenic variants of the MMR genes in the PLSD and IMRC cohorts, of which only the former included mandatory colonoscopy surveillance for all participants.

Methods: CRC incidences were calculated in an intervention group comprising a cohort of confirmed carriers of pathogenic or likely pathogenic variants in mismatch repair genes (path_MMR) followed prospectively by the Prospective Lynch Syndrome Database (PLSD). All had colonoscopy surveillance, with polypectomy when polyps were identified. Comparison was made with a retrospective cohort reported by the International Mismatch Repair Consortium (IMRC). This comprised confirmed and inferred path_MMR carriers who were first- or second-degree relatives of Lynch syndrome probands.

Results: In the PLSD, 8,153 subjects had follow-up colonoscopy surveillance for a total of 67,604 years and 578 carriers had CRC diagnosed. Average cumulative incidences of CRC in path_MLH1 carriers at 70 years of age were 52% in males and 41% in females; for path_MSH2 50% and 39%; for path_MSH6 13% and 17% and for path_PMS2 11% and 8%. In contrast, in the IMRC cohort, corresponding cumulative incidences were 40% and 27%; 34% and 23%; 16% and 8% and 7% and 6%. Comparing just the European carriers in the two series gave similar findings. Numbers in the PLSD series did not allow comparisons of carriers from other continents separately. Cumulative incidences at 25 years were < 1% in all retrospective groups.

Conclusions: Prospectively observed CRC incidences (PLSD) in path_MLH1 and path_MSH2 carriers undergoing colonoscopy surveillance and polypectomy were higher than in the retrospective (IMRC) series, and were not reduced in path_MSH6 carriers. These findings were the opposite to those expected. CRC point incidence before 50 years of age was reduced in path_PMS2 carriers subjected to colonoscopy, but not significantly so.

Keywords: Colonoscopy; Colorectal cancer; Epidemiology; Incidence; Lynch Syndrome; Over-diagnosis; Penetrance; Prevention; Prospective; Segregation analysis.

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Conflict of interest statement

L Senter-Jamieson have received speaking/consultant fees from AstraZeneca in the past year. Carmen Guillén-Ponce: registrations for congresses and continuing education courses by Merck, Sanofi and Astra Zeneca. Toni T. Seppälä reports CEO and co-owner of Healthfund Finland and an interview honoraria from Boehringer Ingelheim Finland. All other authors declare no conflict of interest.

Figures

Fig. 1
Fig. 1
Cumulative incidences of CRC by genetic variant and gender in PLSD (the prospective series with colonoscopy) and IMRC (the retrospective series) in European path_MLH1, path_MSH2 and path_MSH6 carriers. Broken lines indicate 95% confidence intervals

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