Associated joint pathology in the anterior cruciate ligament-deficient knee with emphasis on a classification system and injuries to the meniscocapsular ligament-musculotendinous unit complex.

This article defines the anterior cruciate ligament-deficient knee in terms of capsular instabilities. This definition lends itself to a better assessment of the associated pathology consisting of torn capsular ligaments, torn medial and lateral menisci, chondral fractures, subluxation of the patella, and acute contusion of the peroneal nerve. The specific incidence of torn medial meniscus was 70 per cent, with a torn lateral meniscus identified 77 per cent of the time.