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This article reviews the normal labral variants of the shoulder and describes imaging features, including secondary signs, to help discriminate tears from normal variants. The labral variants can be divided into two main groups. One group is composed of nonstandard appearances in the labral shape, signal intensity, or the site of affixation to the glenoid rim. The other group consists of classic labral variants, where the labrum is partially or completely unattached to the subjacent bone, or a segment of the labrum is absent.

A 3D FSE sequence had improved diagnostic performance compared with 2D FSE sequences for detecting cartilage lesions within the knee joint but only when using both radial and conventional reformatted images for cartilage evaluation.

Compared to fluoroscopy-guided biceps tendon sheath injection, ultrasound had higher initial- and final-pass success rates, visualized abnormalities before injection, and had similar pain relief and complication rates. Ultrasound is more accurate and has greater diagnostic benefits than unguided or fluoroscopy-guided biceps tendon sheath injection.

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