{Reference Type}: Case Reports {Title}: [Williams-Beuren syndrome: a retrospective study of a series of 11 cases at the Mohammed VI University Hospital in Marrakech]. {Author}: Bouzid FZ;Hammou HA;Akallakh H;Dafir K;Tajir M;Aboussair N; {Journal}: Pan Afr Med J {Volume}: 46 {Issue}: 0 {Year}: 2023 暂无{DOI}: 10.11604/pamj.2023.46.94.29604 {Abstract}: Williams-Beuren syndrome is a rare genetic disease (1/20 000) characterized by a microdeletion at 7q11.23 encompassing about 28 genes, including the elastin gene, ELN. It is a sporadic disease in the majority of cases. Easily identifiable in childhood, this developmental disorder associates suggestive face dysmorphism, cardiac defect, psychomotor retardation and specific behavioural and cognitive profile. We conducted a retrospective study of 11 patients with Williams-Beuren syndrome whose data were collected in the Genetics Department of the Mohammed VI University Hospital of Marrakech. The average age of patients was 6.05 years (SD=6.56; interquartile range=5), with a female predominance (64%; 7/11 patients). Almost all patients were mentally retarded and the diagnosis was confirmed in 100% (11) of patients using fluorescence in situ hybridisation (FISH).