Rocha, JGuerra, COliveira, RDória, SRego, RRosas, MJ2013-11-152013-11-152012Epileptic Disord. 2012;14(2):159-62.http://hdl.handle.net/10400.23/545The clinical symptoms associated with chromosome 15q duplication syndrome manifest through a heterogeneous group of symptoms characterised by hypotonia, delay in motor skills and language development, cognitive and learning disabilities, autism spectrum disorder and refractory epilepsy. The late development of Lennox-Gastaut syndrome in patients with 15q11q13 duplication is a possibility that physicians should be aware of. We report the case of a 27-year-old man with a neurodevelopmental syndrome due to a 15q duplication, with intellectual disability, psychiatric disturbances, and an epileptic phenotype diagnosed as late-onset Lennox-Gastaut syndrome.engDuplicação CromossómicaCromossoma Humano Par 15Deficiência IntelectualEspasmos Infantisjournal article