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A clear understanding of the pathophysiology of anterior knee pain is inhibited by the use of imprecise, poorly defined, and often interchanged words, such as malalignment, patellar alignment, maltracking, subluxation, dislocation, and congruence. The literature is filled with articles regarding the diagnosis, "malalignment of the patella," most of which give no precise diagnosis. This article presents a definition of malalignment and a plea for rational descriptive and scientific analysis. Much of what is described is based on theory, not facts. These ideas are supported by clinical experience and logical analysis, but very little in the way of scientific data. Most of the data involve radiographic images, which present only one piece of the puzzle.

Careful patient selection, accurate surgical technique, and careful postoperative rehabilitation are all equally important to success in lateral release surgery. Whether the surgery is performed by open or arthroscopic technique, one must release all layers of the retinaculum, spare the vastus lateralis, extend the release far enough distally, check intraoperative patellar mobility, and obtain absolute hemostasis. Postoperative rehabilitation must stress pain control, early quadriceps contraction, patellar mobility, and knee motion. With attention to these details, successful lateral release surgery is likely in most patients with pathologic lateral patellar tilt and minimal patellofemoral arthrosis.