Medial patellofemoral ligament

Written by Dr Sheila Strover on March 14, 2025

The medial patellofemoral ligament (MPFL) is a small but important ligament stretching from the inner aspect of the patella (knee cap) to the femur bone.

The MPFL supports the patella in position throughout the range of motion of the knee.

Illustration of the medial patellofemoral ligament on the inner aspect of the knee, attached to both tibia and patella.

Function of the MPFL

The MPFL acts as a passive restraint, helping to keep the patella properly aligned. When it is damaged, the patella is free to sublux or even dislocate to the outer side.

When reconstructing the ligament, it is important that it is correctly placed, or else it will be under too much tension at certain positions within the movement range.

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Lateral retinaculum

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