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Revised diagnostic criteria for neurofibromatosis type 1 and Legius syndrome: an international consensus recommendation

  • Eric Legius*
  • , Ludwine Messiaen
  • , Pierre Wolkenstein
  • , Patrice Pancza
  • , Robert A. Avery
  • , Yemima Berman
  • , Jaishri Blakeley
  • , Dusica Babovic-Vuksanovic
  • , Karin Soares Cunha
  • , Rosalie Ferner
  • , Michael J. Fisher
  • , Jan M. Friedman
  • , David H. Gutmann
  • , Hildegard Kehrer-Sawatzki
  • , Bruce R. Korf
  • , V-F Mautner
  • , Sirkku Peltonen
  • , Katherine A. Rauen
  • , Vincent Riccardi
  • , Elizabeth Schorry
  • Anat Stemmer-Rachamimov, David A. Stevenson, Gianluca Tadini, Nicole J. Ullrich, David Viskochil, Katharina Wimmer, Kaleb Yohay, Alicia Gomes, Justin T. Jordan, V Mautner, Vanessa L. Merker, Miriam J. Smith, David A. Stevenson, Monique Anten, Arthur Aylsworth, Diana Baralle, Sebastien Barbarot, Fred Barker, Shay Ben-Shachar, Amanda Bergner, Didier Bessis, Ignacio Blanco, Catherine Cassiman, Patricia Ciavarelli, Maurizio Clementi, Thierry Frébourg, Marco Giovannini, Dorothy Halliday, Chris Hammond, C. O. Hanemann, Helen Hanson, A Heiberg, P Joly, M Kalamarides, M Karajannis, D Kroshinsky, M Larralde, C Lázaro, L Le, M Link, R Listernick, M MacCollin, C Mallucci, C Moertel, A Mueller, J Ngeow, R Oostenbrink, R Packer, L Papi, A Parry, Sirkku Peltonen, D Pichard, B Poppe, N Rezende, LO Rodrigues, T Rosser, M Ruggieri, E Serra, V Steinke-Lange, SM Stivaros, A Taylor, J Toelen, J Tonsgard, E Trevisson, M Upadhyaya, Varan
*Corresponding author for this work
  • KU Leuven
  • University of Alabama at Birmingham
  • Hôpital Henri Mondor
  • Children's Tumor Foundation (CTF)
  • University of Pennsylvania
  • University of Sydney
  • Johns Hopkins University
  • Mayo Clinic College of Medicine and Science
  • Universidade Federal Fluminense
  • Guy's and St Thomas' NHS Foundation Trust
  • University of British Columbia
  • Washington University St. Louis
  • Ulm University
  • University of Gothenburg
  • University of Turku
  • University of California at Davis
  • The Neurofibromatosis Institute
  • Cincinnati Children's Hospital Medical Center
  • Harvard University
  • Stanford University
  • University of Milan
  • University of Utah
  • Innsbruck Medical University
  • New York University
  • University of Manchester
  • Maastricht University
  • University of North Carolina at Chapel Hill
  • University of Southampton
  • Université de Nantes
  • Schneider Childrens Medical Center Israel
  • Columbia University
  • CHU Montpellier
  • Hospital Germans Trias i Pujol
  • Hospital de Clinicas Gral San Martin
  • University of Padua
  • CHU Hôpitaux de Rouen
  • University of California at Los Angeles
  • Oxford University Hospitals NHS Foundation Trust
  • King's College London
  • St George's Hospital

Research output: Contribution to journalArticlepeer-review

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Abstract

<jats:title>Abstract</jats:title><jats:sec> <jats:title>Purpose</jats:title> <jats:p>By incorporating major developments in genetics, ophthalmology, dermatology, and neuroimaging, to revise the diagnostic criteria for neurofibromatosis type 1 (NF1) and to establish diagnostic criteria for Legius syndrome (LGSS).</jats:p> </jats:sec><jats:sec> <jats:title>Methods</jats:title> <jats:p>We used a multistep process, beginning with a Delphi method involving global experts and subsequently involving non-NF experts, patients, and foundations/patient advocacy groups.</jats:p> </jats:sec><jats:sec> <jats:title>Results</jats:title> <jats:p>We reached consensus on the minimal clinical and genetic criteria for diagnosing and differentiating NF1 and LGSS, which have phenotypic overlap in young patients with pigmentary findings. Criteria for the mosaic forms of these conditions are also recommended.</jats:p> </jats:sec><jats:sec> <jats:title>Conclusion</jats:title> <jats:p>The revised criteria for NF1 incorporate new clinical features and genetic testing, whereas the criteria for LGSS were created to differentiate the two conditions. It is likely that continued refinement of these new criteria will be necessary as investigators (1) study the diagnostic properties of the revised criteria, (2) reconsider criteria not included in this process, and (3) identify new clinical and other features of these conditions. For this reason, we propose an initiative to update periodically the diagnostic criteria for NF1 and LGSS.</jats:p> </jats:sec>
Original languageEnglish
Pages (from-to)1506-1513
Number of pages0
JournalGenetics in Medicine
Volume23
Issue number8
Early online date19 May 2021
DOIs
Publication statusPublished - Aug 2021

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