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Dontaine P, Kottos E, Dassonville M, Balasel O, Catros V, Soblet J, Perlot P, Vilain C. Digestive involvement in a severe form of Snyder-Robinson syndrome: Possible expansion of the phenotype. Eur J Med Genet 2020; 64:104097. [PMID: 33186760 DOI: 10.1016/j.ejmg.2020.104097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 10/23/2020] [Accepted: 11/04/2020] [Indexed: 11/30/2022]
Abstract
Snyder-Robinson syndrome (OMIM #309583) is a rare X-linked condition, caused by mutation in the SMS gene (MIM *300105), characterized by a wide spectrum of clinical signs including developmental delay, epilepsy, asthenic habitus, dysmorphism, osteopenia, and renal or genital anomalies. Here we describe two maternal half-brothers who both presented with severe neurodevelopmental delay, seizures, hearing loss, facial dysmorphism, renal and ophthalmologic anomalies, failure to thrive and premature death. A novel p.(Gly203Asp) variant was found at the hemizygous state in the two boys, and an elevated Spermidine/Spermine ratio confirmed the diagnosis of Snyder-Robinson syndrome. One of the brothers presented with gastrointestinal symptoms, with jejunal stenosis, enteral feeding intolerance, failure to thrive due to a dysfunctional gastrointestinal system, cholestasis and exocrine pancreatic insufficiency. Although more studies will be needed to understand its mechanisms, this observation lends further support to the possibility of severe digestive involvement in Snyder Robinson syndrome.
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Affiliation(s)
- Pauline Dontaine
- Department of Genetics, Hôpital Universitaire des Enfants Reine Fabiola, ULB Center of Human Genetics, Universite Libre de Bruxelles, Brussels, Belgium
| | - Elisa Kottos
- Department of Genetics, Hôpital Universitaire des Enfants Reine Fabiola, ULB Center of Human Genetics, Universite Libre de Bruxelles, Brussels, Belgium
| | - Martine Dassonville
- Department of Pediatric Surgery, Hôpital Universitaire des Enfants Reine Fabiola, Universite Libre de Bruxelles, Brussels, Belgium
| | - Ovidiu Balasel
- Department of Neonatalogy, Hôpital Universitaire des Enfants Reine Fabiola, Universite Libre de Bruxelles, Brussels, Belgium
| | - Véronique Catros
- Univ Rennes, Inserm, CHU Rennes, Institut NUMECAN (Nutrition Metabolisms and Cancer), CRB Santé Rennes, F-35000, Rennes, France
| | - Julie Soblet
- Department of Genetics, Hôpital Universitaire des Enfants Reine Fabiola, ULB Center of Human Genetics, Universite Libre de Bruxelles, Brussels, Belgium; Department of Genetics, Hôpital Erasme, ULB Center of Human Genetics, Universite Libre de Bruxelles, Brussels, Belgium; Interuniversity Institute of Bioinformatics in Brussels, Universite Libre de Bruxelles, Brussels, Belgium
| | - Pascale Perlot
- Department of Pediatrics, Hôpital Universitaire des Enfants Reine Fabiola, Universite Libre de Bruxelles, Brussels, Belgium
| | - Catheline Vilain
- Department of Genetics, Hôpital Universitaire des Enfants Reine Fabiola, ULB Center of Human Genetics, Universite Libre de Bruxelles, Brussels, Belgium; Department of Genetics, Hôpital Erasme, ULB Center of Human Genetics, Universite Libre de Bruxelles, Brussels, Belgium; Interuniversity Institute of Bioinformatics in Brussels, Universite Libre de Bruxelles, Brussels, Belgium.
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