FAI
Pronunciation: F-A-I
Also written as: FAI — Femoroacetabular Impingement
Femoroacetabular impingement; abnormal contact between femoral neck and acetabular rim.
Full Definition
Femoroacetabular impingement (FAI) is a pathological condition where abnormal bony morphology of the femoral head-neck junction or acetabulum leads to abnormal contact during hip motion, causing pain and potential cartilage damage. FAI is classified into three types: cam impingement (femoral-sided), pincer impingement (acetabular-sided), or mixed type. This condition is increasingly recognized as a cause of hip pain in young adults and may predispose to early osteoarthritis if left untreated.
Usage
Usage note: Spell out on first use; distinguish cam, pincer, and mixed types in documentation.
In Context
- "MRI arthrography revealed cam-type FAI with associated anterosuperior labral tear." — Imaging report
- "Hip arthroscopy was performed to address symptomatic FAI with femoral osteochondroplasty." — Surgical summary