Intellectual disability-spasticity-ectrodactyly syndrome

Intellectual disability-spasticity-ectrodactyly syndrome is an extremely rare genetic condition characterized by the combination of intellectual disability, spasticity (increased muscle tone and stiffness), and ectrodactyly (a limb malformation involving the absence or malformation of one or more central digits of the hands and/or feet, sometimes referred to as split hand/foot malformation). This syndrome affects the central nervous system, the musculoskeletal system, and limb development. Affected individuals typically present with moderate to severe intellectual disability, progressive spastic paraplegia or tetraplegia affecting motor function, and congenital limb anomalies that are apparent at birth. The condition has been described in only a very small number of families in the medical literature, making it one of the rarest recognized genetic syndromes. Due to the extremely limited number of reported cases, the natural history and full phenotypic spectrum of this disorder remain incompletely characterized. Some reported cases have suggested an autosomal recessive inheritance pattern based on familial recurrence patterns, including occurrence in siblings born to unaffected parents. The underlying genetic cause has not been definitively established. There is currently no specific or curative treatment for this syndrome. Management is supportive and multidisciplinary, involving physical therapy and rehabilitation for spasticity, orthopedic interventions or adaptive devices for limb malformations, and educational support and developmental therapies for intellectual disability.

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