As previously indicated, ultrasound examination was performed to diagnose cam and pincer impingement and to assess the condition of the acetabular labrum
. Isolated cam FAI was diagnosed in 106 hips (65%), isolated pincer FAI in 6 hips (3.6%), and mixed FAI in 7 (4.2%) of 164 hips.
(23) Os acetabuli can also be acquired as sequelae of incompletely healed fractures or ossification of the acetabular labrum
. These structures are typically asymptomatic; if large enough, however, they may contribute to symptoms of femoroacetabular impingement.
Investigation of the preservation of the fluid seal effect in the repaired, partially resected, and reconstructed acetabular labrum
in a cadaveric hip model.
Preoperative coronal FIESTA 3D (c), coronal T1-weighted fat-saturated (d), and sagittal protondensity fat-saturated (e, f) magnetic resonance sequences with intra-articular contrast reveal the tumor, a 2.5 cm intermediate to low signal focus within the inferomedial aspect of the right hip joint, in addition to a complex tear of the right anterior and anterosuperior acetabular labrum
. A = anterior; P = posterior.
The continuous effect of this chronic outward shear stress could lead to hypertrophy of the acetabular labrum
, and secondary damage to the acetabular cartilage connected to the labrum.
The acetabular labrum
: anatomic and functional characteristics and rationale for surgical intervention.
(1,6) As the acetabular labrum
and articular cartilage degenerate, pain frequency increases.
In particular, the rotational velocity contributing to the stress at the hip joint, may expose the acetabular labrum
to risk for tear.
However, dislocation can lead to osteoarthritis due to the mechanical overload, while impingement causes injury to the acetabular labrum
and adjacent cartilage.
Magnetic resonance arthrogram (MRA) showed a severely degenerated and torn acetabular labrum
with paralabral cysts (Fig.
No synovial effusion was found; the articular cartilage and acetabular labrum