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Noonan syndrome

Last reviewed: 22 Jul 2025
Last updated: 10 Dec 2024

Summary

Definition

História e exame físico

Principais fatores diagnósticos

  • positive family history
  • short stature
  • dysmorphic facial features
  • cryptorchidism
  • cardiac anomalies
  • delayed puberty
  • easy bruising or bleeding
  • lymphedema
  • pigmentary anomalies
  • sparse or absent eyebrows and lashes
  • splenomegaly
Detalhes completos

Outros fatores diagnósticos

  • abnormalities identified prenatally
  • chest deformity
  • developmental delay/learning difficulty
  • skeletal anomalies
  • muscle weakness
  • history of renal malformation
Detalhes completos

Fatores de risco

  • family history of NS
  • advanced paternal age
Detalhes completos

Investigações diagnósticas

Primeiras investigações a serem solicitadas

  • ECG
  • echocardiogram
Detalhes completos

Investigações a serem consideradas

  • CBC
  • coagulation profile
  • molecular genetic testing
  • abdominal ultrasound
  • renal ultrasound
Detalhes completos

Algoritmo de tratamento

AGUDA

all patients

Colaboradores

Autores

David A. Stevenson, MD

Associate Professor

Department of Pediatrics

Division of Medical Genetics

Stanford University

Stanford

CA

Declarações

DAS has acted as a consultant for Lineagen, GLG, and Alexion, and has given expert testimony. He is on the medical advisory board for parents' support groups for Costello syndrome and CFC syndrome. DAS is an author of a reference cited in this topic. DAS has also been reimbursed by RASopathies Network for attending conferences.

Agradecimentos

Dr David A. Stevenson would like to gratefully acknowledge Dr Judith E. Allanson, the previous contributor to this topic. JEA is an author of a number of references cited in this topic.

Revisores

Liliana N. Contreras, MD

Chief

Endocrine Research Department

Instituto de Investigaciones Médicas Alfredo Lanari

IDIM-CONICET

University of Buenos Aires

Argentina

Declarações

LNC declares that she has no competing interests.

Bruce Gelb, MD

Professor of Pediatrics

Mount Sinai School of Medicine

New York

NY

Declarações

BG received royalties from GeneDx, Correlegan, Preventative Genetics, Baylor College of Medicine, and Harvard Medical School/Partners for genetic testing of Noonan syndrome. BG is an author of a number of references cited in this topic.

Jacqueline Noonan, MD

Professor Emeriti

Department of Pediatrics

College of Medicine

University of Kentucky

Lexington

KY

Declarações

JN is on the Noonan Syndrome Advisory Board for Novo Nordisk and has received payment for speaking at a symposium. JN is an author of a number of references cited in this topic.

Referências

Nossas equipes internas de editoria e de evidências trabalham em conjunto com colaboradores internacionais especializados e pares revisores para garantir que forneçamos acesso às informações o mais clinicamente relevantes possível.

Principais artigos

Jorge AA, Malaquias AC, Arnhold IJ, et al. Noonan syndrome and related disorders: a review of clinical features and mutations in genes of the RAS/MAPK pathway. Horm Res. 2009;71(4):185-93.Texto completo  Resumo

Shaw AC, Kalidas K, Crosby AH, et al. The natural history of Noonan syndrome: a long-term follow-up study. Arch Dis Child. 2007 Feb;92(2):128-32.Texto completo  Resumo

Allanson JE. Noonan syndrome. J Med Genet. 1987 Jan;24(1):9-13.Texto completo  Resumo

Lee DA, Portnoy S, Hill P, et al. Psychological profile of children with Noonan syndrome. Dev Med Child Neurol. 2005 Jan;47(1):35-8. Resumo

Ishizawa A, Oho S, Dodo H, et al. Cardiovascular abnormalities in Noonan syndrome: the clinical findings and treatments. Acta Paediatr Jpn. 1996 Feb;38(1):84-90. Resumo

Romano AA, Allanson JE, Dahlgren J, et al. Noonan syndrome: clinical features, diagnosis, and management guidelines. Pediatrics. 2010 Oct;126(4):746-59. Resumo

Raaijmakers R, Noordam C, Karagiannis G, et al. Response to growth hormone treatment and final height in Noonan syndrome in a large cohort of patients in the KIGS database. J Pediatr Endocrinol Metab. 2008 Mar;21(3):267-73. Resumo

Artigos de referência

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