<b>Sublabral Sulcus at the Posteroinferior Acetabulum:</b> A Potential Pitfall in MR Arthrography Diagnosis of Acetabular Labral Tears

Abstract

A posteroinferior sublabral groove is a relatively common normal anatomic hip variation. If not recognized as normal, the sulcus may serve as a diagnostic pitfall on MR arthrography. Its location is distinct from most labral tears. We did not discover a sublabral sulcus at the anterior or anterosuperior acetabulum, the most common sites of labral injury.