Silver-Russell syndrome due to 7p11.2p13 microduplication

Silver-Russell syndrome due to 7p11.2p13 microduplication is a rare genetic condition that represents one of the molecular subtypes of Silver-Russell syndrome (SRS). This form is caused by a microduplication in the short arm of chromosome 7, specifically in the 7p11.2 to 7p13 region. Silver-Russell syndrome is a clinically heterogeneous imprinting disorder primarily characterized by severe intrauterine and postnatal growth restriction, resulting in short stature that is disproportionate with relative macrocephaly (a head that appears large relative to the body). Affected individuals typically present with a triangular facial appearance, prominent forehead, body asymmetry (limb length discrepancy), feeding difficulties in early life, and low body mass index. Clinodactyly of the fifth finger is also commonly observed. The condition affects multiple body systems, including the musculoskeletal system (growth restriction, asymmetry), the craniofacial region (characteristic facial features), and the gastrointestinal system (feeding difficulties and failure to thrive in infancy). Some patients may also experience developmental delay or learning difficulties, though cognitive outcomes are variable. Growth restriction is typically evident prenatally, with low birth weight and length for gestational age being hallmark features. There is no cure for Silver-Russell syndrome due to 7p11.2p13 microduplication, but management is multidisciplinary and supportive. Growth hormone therapy is a well-established treatment that can improve final adult height and body composition. Nutritional support is critical in early childhood to address feeding difficulties and promote adequate caloric intake. Orthopedic monitoring may be needed for limb length discrepancy, and developmental support services can help address any learning or speech delays. Regular follow-up with endocrinology, genetics, and other specialists is recommended throughout childhood and into adulthood.

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