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  • This syndrome has characteristics of severe growth retardation associated with immunodeficiency. Less than 10 cases have been described in literature. Individuals present with typical clinical and biochemical features of Laron syndrome such as post-natal growth retardation, delayed bone age and facial dysmorphism (prominent forehead, hypoplastic nasal bridge), and low serum IGF-1 concentrations with normal or high GH concentrations. Immunodeficiency has manifestations of moderate lymphopenia which leads to recurrent infections of the skin and respiratory tract. The syndrome is due to mutation in the signal transducer and activator of transcription 5b gene (STAT5b). Transmission is autosomal recessive.
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