Hip or Groin Pain? Maybe it's Femoracetabular Impingement or FAI?

What is Femoroacetabular Impingement?

Femoroacetabular Impingement (FAI) is a hip condition which describes a mechanical mismatch between the hip “ball” and the “socket”.

There are three described types of femoroacetabular impingement:

Cam Type FAI

‘Cam’ type femoroacetabular impingement describes a ‘bump’ on the surface of the femoral head (ball) which jams on the rim of the (acetabulum) socket. This typically affects young athletic men.

cam femoroacetabular impingement

Pincer Type FAI

‘Pincer’ type femoroacetabular impingement describes an increased coverage by the acetabulum over the anterior femoral head. This typically affects middle aged women and is less common.
Pincer femoroacetabular impingement

Mixed Type FAI

Often there can be a combination of both cam and pincer types, which is termed “

Mixed femoroacetabular impingement

What Causes Femoroacetabular Impingement?

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What are the Symptoms of Femoroacetabular Impingement?

FAI often presents as hip and groin pain with restricted range of hip motion.
Symptom onset can be acute, following injury, or insidious after prolonged exertion.
Pain is often provoked with prolonged sitting, walking, crossing the legs as well as during and after sport and exercise.
There will typically be a restriction in hip flexion and internal rotation range of motion.
Pain is primarily felt deep in the groin at the front of the hip, more rarely it can be on the side of the hip or the buttock.