title: Congenital dislocation of the patella - clinical case.
abstract: Congenital patellar dislocation is a rare condition in which the patella is permanently dislocated and cannot be reduced manually. The patella develops normally as a sesamoid bone of the femur. This congenital dislocation results from failure of the internal rotation of the myotome that forms the femur, quadriceps muscle and extensor apparatus. It usually manifests immediately after birth, although in some rare cases, the diagnosis may be delayed until adolescence or adulthood. Early diagnosis is important, thereby allowing surgical correction and avoiding late sequelae, including early degenerative changes in the knee. A case of permanent dislocation of the patella is presented here, in a female child aged seven years.
authors.affiliation: Unidade Local de Saúde Alto Minho, Viana do Castelo, Portugal.
authors.forename: Pedro
authors.initials: P
authors.lastname: Miguel Sá
authors.affiliation: Unidade Local de Saúde Alto Minho, Viana do Castelo, Portugal.
authors.forename: Filipa
authors.initials: F
authors.lastname: Raposo
authors.affiliation: Centro Hospitalar São João, Porto, Portugal.
authors.forename: Manuel
authors.initials: M
authors.lastname: Santos Carvalho
authors.affiliation: Centro Hospitalar São João, Porto, Portugal.
authors.forename: Nuno
authors.initials: N
authors.lastname: Alegrete
authors.affiliation: Centro Hospitalar São João, Porto, Portugal.
authors.forename: Jorge
authors.initials: J
authors.lastname: Coutinho
authors.affiliation: Centro Hospitalar São João, Porto, Portugal.
authors.forename: Gilberto
authors.initials: G
authors.lastname: Costa
keywords: Knee joint/surgery; Orthopedic procedures/methods; Patellar dislocation/congenital; Patellar dislocation/surgery; Range of joint motion