Two cases of a falling anterior glenoid labrum are presented. The anterior labrum appears normal on supine double contrast computed tomographic arthrography (DCCTA). However, on prone DCCTA the anterior labrum falls away from the glenoid. The addition of prone DCCTA in these two cases reveals a labral tear, occult on routine supine DCCTA.
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Pierce et al. (1994) studied this question.
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