Femoro-Acetabular Impingement (FAI)

Question 1

What (3) subtypes can femoro-acetabular impingement (FAI) be subdivided into in the hip?

Answer 1

• Cam lesion: additional bone at the femoral head/neck junction
• Pincer deformity: overgrowth of bone at the acetabular margin
• Mixed lesion: containing both cam + pincer

Question 2

What diagnosis is characterised by cam or pincer lesions?

Answer 2

Femoroacetabular impingement (FAI)

Question 3

What objective assessment findings might be present with a patient with FAI?

Answer 3

• Positive FADDIR test
• Reduced hip flexion
• Hip flexor weakness

Question 4

What is Femoro-acetabular impingement (FAI)?

Answer 4

Abnormal contact between the femoral neck & the acetabulum

Question 5

What are the (3) main subtypes of femoro-acetabular impingement (FAI)?

Answer 5

• Cam lesion
• Pincer deformity
• Mixed lesion

Question 6

What is Cam lesion in FAI?

Answer 6

Where there is additional bone at the femoral head/neck junction

Question 7

What is Pincer deformity in FAI?

Answer 7

Where there is an overgrowth of bone at the acetabular margin

Question 8

What is Mixed lesion in FAI?

Answer 8

Containing both cam and pincer.

Question 9

Where is pain most commonly reported in femoro-acetabular impingement (FAI)?

Answer 9

Groin, but can be anterior thigh, buttocks or lateral hip

Question 10

What are the aggs of femoro-acetabular impingement (FAI)?

Answer 10

Prolonged sitting & deep flexion with hip flexion + internal rotation restricted + painful

Question 11

What is femoro-acetabular impingement (FAI) often miss-diagnosed as?

Answer 11

Groin strains

Question 12

What has femoro-acetabular impingement (FAI) been linked to if not diagnosed & managed?

Answer 12

Early onset osteoarthritis