(iv) Patellofemoral dysfunction—Extensor mechanism malalignment

SummaryAnterior knee pain has many causes. When it arises from the knee extensor mechanism, those with normal alignment must be distinguished from those with malalignment. Patellar dislocation is at one extreme of a spectrum of disorders that are due to malalignment of the extensor mechanism of the knee. This article discusses important aspects of extensor mechanism malalignment and a logical approach to operative treatment for patients with failed conservative therapy.