Excessive lateral pressure syndrome (ELPS) is a collection of symptoms and signs related to the edge of the kneecap being forced abnormally against the wall of the underlying groove.

Page updated February 2024 by Dr Sheila Strover (Clinical Editor)

lateral patellar tilt

Tight lateral structures or muscle imbalance may lead to tilt of the patella to the lateral side.

pain in MFPL from lateral tilt

This may put strain on the medial side and tenderness in the region of the medial patellofemoral ligament (MPFL)

excessive lateral pressure

Cartilage damage may occur on the lateral side from the increased pressure


Cartilage damage from ELPS

Anterior knee pain is experienced, which tends to worsen as contact pressure increases when the knee is flexed. Over time the adjacent lateral patella and lateral femoral condyle may show damage to the joint cartilage and underlying bone.

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Lateral patellar compression syndrome
Lateral hyperpressure syndrome
Lateral pressure in flexion syndrome

Dr Sheila Strover (Editor)
BSc (Hons), MB BCh, MBA

See biography...


See also -

Anterior Knee Pain - an approach to investigation - ebook