Arthroscopic Posterior Knee Capsulotomy for a Fixed Flexion Contracture in a Ten-Year-Old Boy Due to a Hypertrophied Ligamentum Mucosum: A Case Report.

Abstract

Knee flexion contractures are difficult to treat effectively. We present the case of a ten-year-old boy with a flexion contracture due to a hypertrophied ligamentum mucosum treated with an arthroscopic posterior capsular release. The patient obtained full extension and maintained it at the time of final follow-up. This case represents a unique cause of an impinging ligamentum mucosum and provides anecdotal support to the concept of an arthroscopic posterior capsular release as a safe and effective option for flexion contractures.