- Correspondence to Dr E Wakeling, North West Thames Regional Genetic Service (Kennedy-Galton Centre), Level 8V, North West London Hospitals NHS Trust, Watford Rd, Harrow, Middlesex, HA1 3UJ, UK;
- Accepted 10 January 2011
- Published Online First 24 February 2011
Silver–Russell syndrome (SRS) is characterised by intrauterine growth restriction, poor postnatal growth, relative macrocephaly, triangular face, asymmetry and feeding difficulties. As many of these features are non-specific, clinical diagnosis of SRS remains difficult. Hypomethylation of the imprinting control region (ICR) 1 on chromosome 11p15 and maternal uniparental disomy (mUPD) for chromosome 7 are found in up to 60% and around 5–10% of patients with SRS, respectively. Patients with ICR1 hypomethylation are more likely to have classical features of SRS, including asymmetry; patients with mUPD7 are more likely to have learning difficulties, particularly speech problems, although these are usually mild. As features vary widely in severity, clinicians should have a low threshold for genetic investigation of patients with features suggestive of SRS.
Competing interests None.
Patient consent Obtained.
Provenance and peer review Commissioned; externally peer reviewed.