Accuracy of MRI in diagnosing intra-articular pathology of the long head of the biceps tendon: results with a large cohort of patients.

The standard non-enhancing 3 T MRI had a high diagnostic value in preoperative detection of LHBT pathology. Its accuracy was increased when diagnostic criterion was set as '2 or more abnormal signs (diameter change, contour irregularity, and alteration of signal intensity)'. The single diagnostic sign with the highest sensitivity was alteration of signal intensity in the parasagittal view.