Symptomatic calcification of the lateral collateral ligament: a case report.

Symptomatic calcification is an entity in which hydroxyapatite calcific deposits cause inflammation, then burst and dissolve into the surrounding structures. Although a well-known pathologic condition in the rotator cuff tendons, it can also occur in other structures of the locomotor system. Radiographs are usually taken at the initial examination but can also be useful for follow-up evaluation of the course of the calcified matter. Here, we present a case of symptomatic calcification of the lateral collateral ligament of the knee, in which movement of the calcified matter could be observed both by radiography and magnetic resonance imaging as correlated with the clinical symptoms.