LymphedemaV1, Main, Exploration, bibRecord, 007421

The natural history of Noonan syndrome: a long-term follow-up study

Identifieur interne : 007421 ( Main/Exploration ); précédent : 007420; suivant : 007422

The natural history of Noonan syndrome: a long-term follow-up study

Auteurs : A C Shaw [Royaume-Uni] ; K. Kalidas [Royaume-Uni] ; A H Crosby [Royaume-Uni] ; S. Jeffery [Royaume-Uni] ; M A Patton [Royaume-Uni]

Source :

Archives of Disease in Childhood [ 0003-9888 ] ; 2007-02.

RBID : ISTEX:A792E773028DE1946340D3B3166D6744584910F9

English descriptors

KwdEn :
- HCM, hypertrophic cardiomyopathy, SDS, standard deviation score.

Abstract

Objective: To define better the adult phenotype and natural history of Noonan syndrome. Design: A prospective observational study of a large cohort. Results: Data are presented for 112 individuals with Noonan syndrome (mean age 25.3 (range 12–71) years), who were followed up for a mean of 12.02 years. Mutations in PTPN11 were identified in 35% of probands. Ten subjects died during the study interval; three of these deaths were secondary to heart failure associated with hypertrophic cardiomyopathy. Pulmonary stenosis affected 73 (65%) subjects; 42 (58%) required no intervention, nine underwent balloon pulmonary valvuloplasty (three requiring further intervention) and 22 surgical valvuloplasty (three requiring further intervention). Hypertrophic cardiomyopathy affected 21 (19%) patients, which had remitted in two cases, but one subject required cardiac transplant. No subjects died suddenly or had symptoms suggestive of arrhythmia. The mean final adult height was 167.4 cm in males and 152.7 cm in females. Feeding problems in infancy were identified as a predictor of future outcome. The mean age of speaking in two-word phrases was 26 months for those with no feeding difficulties, compared with 39 months for those with severe problems requiring nasogastric feeding. Attendance at a school for children with special needs for the same groups was 12.5% and 58%, respectively. A statement of special educational need had been issued in 44% overall; however, academic achievement was broadly similar to that of the general population. Implications: Although the morbidity for some patients with Noonan syndrome is low, early predictors of poorer outcome have been identified, which will help ascertain those most in need of intervention.

Url:

DOI: 10.1136/adc.2006.104547

Affiliations:

Le document en format XML

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<front><div type="abstract" xml:lang="en">Objective: To define better the adult phenotype and natural history of Noonan syndrome. Design: A prospective observational study of a large cohort. Results: Data are presented for 112 individuals with Noonan syndrome (mean age 25.3 (range 12–71) years), who were followed up for a mean of 12.02 years. Mutations in PTPN11 were identified in 35% of probands. Ten subjects died during the study interval; three of these deaths were secondary to heart failure associated with hypertrophic cardiomyopathy. Pulmonary stenosis affected 73 (65%) subjects; 42 (58%) required no intervention, nine underwent balloon pulmonary valvuloplasty (three requiring further intervention) and 22 surgical valvuloplasty (three requiring further intervention). Hypertrophic cardiomyopathy affected 21 (19%) patients, which had remitted in two cases, but one subject required cardiac transplant. No subjects died suddenly or had symptoms suggestive of arrhythmia. The mean final adult height was 167.4 cm in males and 152.7 cm in females. Feeding problems in infancy were identified as a predictor of future outcome. The mean age of speaking in two-word phrases was 26 months for those with no feeding difficulties, compared with 39 months for those with severe problems requiring nasogastric feeding. Attendance at a school for children with special needs for the same groups was 12.5% and 58%, respectively. A statement of special educational need had been issued in 44% overall; however, academic achievement was broadly similar to that of the general population. Implications: Although the morbidity for some patients with Noonan syndrome is low, early predictors of poorer outcome have been identified, which will help ascertain those most in need of intervention.</div>
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The natural history of Noonan syndrome: a long-term follow-up study

The natural history of Noonan syndrome: a long-term follow-up study

Source :

English descriptors

Abstract

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