# The ‘forgotten’ lateral patellofemoral ligament: The known unknown

## TL;DR

The lateral patellofemoral ligament is a key stabilizer of the knee that is often overlooked and primarily injured during medical procedures.

## Contribution

This paper highlights the anatomical and functional significance of the LPFL and emphasizes its reconstruction as the primary treatment for injuries.

## Key findings

- The LPFL is a non-isometric ligament that shortens during knee flexion.
- Over 90% of LPFL injuries are iatrogenic, and reconstruction is the gold standard treatment.
- The LPFL is firmly attached to the lateral femoral epicondyle and patellar structures.

## Abstract

Level V.

The lateral patellofemoral ligament (LPFL) is an anatomical structure in the second layer of the knee joint and a stabilizer of the patella against medial dislocation. It has firm attachments to the lateral femoral epicondyle and the lateral edge of the patella and patellar tendon. LPFL is non‐isometric and decreases its length during knee flexion. Most LPFL injuries are iatrogenic (>90%), with LPFL reconstruction being the gold standard treatment option.