Ultrasound versus magnetic resonance arthrography in acetabular labral tear diagnostics: a prospective comparison in 20 dysplastic hips

Abstract

The ability of US examination in diagnosing acetabular labral tears is not yet good enough. The technique is still to be developed, and more experience, especially with the interpretation of US examinations, is needed.

Cross-sectional area of the labrum: role in the diagnosis of anterior acetabular labral tears

“…The sensitivity of such an approach is reported to range from 13% to 94% [8][9][10]. There is thus a wide range of sensitivity and studies are scarce.…”

“…Diagnosis of an acetabular labral tear on ultrasound imaging was previously based on displacement or absence of the labrum; hypoechoic cleft through the base of the labrum causing detachment with or without displacement; and intrasubstance hypoechoic linear clefts, cystic or irregular formations [7][8][9][10]. The sensitivity of such an approach is reported to range from 13% to 94% [8][9][10].…”

“…Type B labra reflect labral degeneration and were frequently associated with frank labral tears or detachment. These morphological changes involving the AL have not been studied before by ultrasonography, but studies up to now have focused on direct assessment of the labral tear [7][8][9][10]. The aim of our study was to investigate whether ultrasound can demonstrate labral thickening by means of cross-sectional area (CSA) measurements and whether the CSA measurements could be used for the diagnosis of labral tear alone or in combination with direct signs of tear on ultrasound.…”

A review of imaging modalities for the hip

“…Labral pathology may also be rudimentarily identified as a hypoechoic cleft or detachment in an otherwise hyperechoic, smooth, triangular-shaped labrum. The disadvantages of using ultrasound to evaluate the labrum are the limited evaluation of the posterior labrum and the low sensitivity (44 %), as compared with MR arthrography [27]. Paralabral cyst, often associated with a torn labrum, appears as hypoechoic multilocular collections abutting the labrum [28].…”

Cartilage Thickness in the Hip Measured by MRI and Stereology Before and After Periacetabular Osteotomy

“…The criteria for labral tears seen with MRA were (1) displacement or (2) absence of the labrum; (3) contrast media through the base of the labrum causing detachment with or without displacement; and intrasubstance (4) linear; (5) cystic; or (6) irregular presence of contrast media. Intermediate signal intensity and irregular margins were interpreted as degenerative changes [41].…”