Congenital dislocation of the patella may occur as an isolated entity or in concert with syndromes such as nail-patellasyndrome (Figure 30.1), Down syndrome, Rubinstein–Taybi syndrome or in children with arthrogryposis. 1,2 If it is part of a more generalised syndrome, appropriate medical care may be needed for these children in addition to that for the patellar dislocation. A new-born infant with a congenital dislocation of the patella of the left side. The characteristic external rotation of the tibia <bold>(a)</bold> and the fixed flexion deformity <bold>(b)</bold> are clearly seen. https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9780429153402/60dd6ceb-c28b-4220-8467-fddcbb87fb54/content/fig30_1.jpg"/>