Silver-Russell syndrome (SRS) is a clinically heterogeneous disorder characterized mainly by intrauterine and postnatal growth retardation. While maternal uniparental disomy of chromosome 7 is found in 5-10% of SRS patients, recently genetic and epigenetic mutations affecting the imprinting centres on chromosome 11p15 have been reported in up to 64% of patients. Chromosome 11p15 abnormalities reported in SRS include methylation defects in the imprinting centre 1 (ICR1) and maternally inherited duplications involving all or part of the imprinted region of 11p15. Here we report the first published case of SRS with mosaic maternal uniparental disomy of chromosome 11.
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