Review Question - QID 3496

The pectoralis major tendon is a reproducible structure from which the humeral height during shoulder arthroplasty can be based upon, even in fracture situations where the anatomy is distorted. The superior edge of the pectoralis major tendon at its insertion on the humerus is 5.6 cm below the top of the humeral head.

The referenced study by Torrens et al is a cadaveric evaluation of the pectoralis major tendon and proximal humeral anatomy. They reported that the top of the head sits 5.6cm proximal to the superior border of the pectoralis major tendon.

The referenced study by Greiner et al is a retrospective review of shoulder hemiarthroplasty; improved radiographic and clinical outcomes were reported when the pectoralis major tendon was used as a reference for humeral height. Improved outcomes were also reported with successful tuberosity healing and centering of the humeral head in the glenoid.

The referenced study by Murachovsky et al is another cadaveric study that found the pectoralis major tendon is a reproducible means from which to base the humeral height. The distance reported was 5.6 +/- 0.5 cm in 40 shoulders.