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Anomalous Intraarticular Origin of the Long Head of Biceps Brachii

The literature is replete in discussing anatomic variants of the origin of the long head of the biceps brachii (LHBB). Although the literature describes these various intraarticular biceps tendon anchors, only two cases detail an LHBB tendon origin that have an association with the rotator cuff tendon. MacDonald describes an LHBB tendon that was adherent and confluent to the rotator cuff throughout its intraarticular course. Hyman and Warren report an extraarticular, extracapsular LHBB tendon that had incorporated into the supraspinatus tendon. The purpose of reporting this case is to describe an LHBB tendon that originates from the anterior border of the undersurface of the supraspinatus tendon but is otherwise normal as it traverses within the glenohumeral joint.