BACKGROUND: Delamination of acetabular articular cartilage is a common abnormality in hips with @entity1743 . The purpose of the present study was to identify clinical and radiographic factors predisposing to delamination and to assess the diagnostic accuracy of magnetic resonance arthrography for the detection of these lesions. METHODS: Following a retrospective review of records, we determined that acetabular cartilage delamination had been present in twenty-eight of sixty-four hips that had undergone a surgical dislocation procedure for the treatment of @entity1743 . Multivariable logistic regression was performed to assess the correlation of radiographic findings (i.e., magnetic resonance imaging and computerized tomography findings) with the status of delamination. The preoperative interpretations of the magnetic resonance arthrograms for twenty-seven hips that underwent surgical dislocation were reviewed to assess the accuracy of detecting delamination. At the time of surgery, nine of these twenty-seven hips were found to have delamination. Magnetic resonance arthrography interpretations that did not correlate with operative findings were subjected to conspicuity assessment and error analysis. RESULTS: The rate of delamination of the acetabular cartilage as noted at the time of surgical dislocation was 44% (twenty-eight of sixty-four). Delamination was strongly associated with male sex and femoral sided signs of impingement; however, it was not associated with acetabular overcoverage (center-edge angle, >40 degrees) (odds ratio = 0.16; p < 0.05). While there was no significant difference in the prevalence of labral lesions between groups, whenever @entity75 were found in the same hip, they were directly adjacent to one another. Preoperative magnetic resonance arthrography had a low sensitivity for delamination (22%) but had a high specificity (100%). Two-thirds of the delamination lesions were visible on retrospective review of these images when the reader was unblinded to the surgical findings. Delamination could most often be identified on the sagittal T1-weighted image and on the proton-density sequences with fat saturation. DISCUSSION: There should be a high level of suspicion for articular cartilage delamination in @entity1 and in @entity1 with primarily cam-type @entity1743 . Acetabular overcoverage may be protective against delamination. Preoperative high-quality magnetic resonance arthrograms should be carefully analyzed for evidence of delamination in this @entity1 population.

Acetabular cartilage delamination in XXXX . Risk factors and magnetic resonance imaging diagnosis.

@entity75 :: ('MESH:D001927', 'Disease') :: ['labral and delamination lesions'] @entity1 :: ('9606', 'Species') :: ['patients', 'patient', 'men'] @entity1743 :: ('MESH:D057925', 'Disease') :: ['femoroacetabular impingement']
@entity1743 :: (MESH:D057925,Disease) :: ['femoroacetabular impingement']
