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An extremely rare and severe early-lethal form of Simpson-Golabi-Behmel syndrome. The disease is an overgrowth-multiple anomalies syndrome with characteristics of hydrops fetalis, macrocephaly, facial dysmorphism, short neck, redundant skin, skeletal defects (involving upper and lower limbs), hypoplastic nails, gastrointestinal and genitourinary anomalies, hypotonia and neurologic impairment. Severe intellectual disability, obesity and infections (pneumonia, sepsis) have been reported.
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