MRI just as effective as MR arthrography for diagnosising hip labral tears

Conventional magnetic resonance imaging (MRI) may be an effective alternative to minimally invasive MR arthrography for the diagnosis of hip labral tears, a common cause of hip pain, according to a study to be presented at the American Roentgen Ray Society 2010 Annual Meeting in San Diego, CA.

A hip labral tear involves the rim of tissue that surrounds and deepens the hip joint. Symptoms include hip pain or a "catching" sensation in your hip joint. Diagnosing hip labral tears often involves the use of MR arthrography, a minimally invasive procedure that involves the injection of contrast material into the hip.

The study, performed at the University of Wisconsin, compared the use of conventional noninvasive MRI with MR arthrography in 30 patients who had undergone preoperative imaging with both techniques. All MRI and MR arthrogram studies for each patient were independently reviewed by three radiologists.

"Conventional hip MRI and MR arthrogram studies revealed no significant difference between the two imaging techniques in the detection of labral tears for any of the three readers in our study group," said Colin Strickland, MD, lead author of the study. "Minimally-invasive MR arthrography remains the preferred test for the evaluation of suspected hip labral tears. However our study suggests that conventional, noninvasive MRI may detect a large percentage of these tears," said Strickland.

Further study is needed to determine if conventional MRI is an acceptable alternative to MR arthrography, especially in the evaluation of nonspecific hip pain.

(Source: American Roentgen Ray Society: ARRS 2010 Annual Meeting, San Diego: May 2010)