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Glenoid bone loss nearly doubled in patients with ALPSA
Compared with patients with anterior shoulder instability who have a Bankart tear, patients with an anterior labroligamentous periosteal sleeve avulsion lesion had nearly twice the amount of glenoid bone loss, according to study results.
During a 3-year period, researchers retrospectively reviewed data for 83 patients treated for anterior shoulder instability and identified 39 with an anterior labroligamentous periosteal sleeve avulsion (ALPSA) lesion and 44 with no ALPSA tear.
The researchers determined glenoid bone loss radiographically by 3-D CT and with arthroscopic techniques at the time of surgery. Demographic data, such as the time from the initial instability event to advanced imaging and surgery, were analyzed with the Student t test to determine any significant differences between the two groups.
Compared with patients without an ALPSA lesion, patients with an ALPSA lesion had more preoperative instability events, according to the researchers. 3D-CT showed a 12.7% mean glenoid bone loss among patients with ALPSA tears vs. 6.25% in patients without ALPSA tears.
The researchers found a mean duration of total instability of 42.9 months for patients with ALPSA tears compared with 46.3 for patients without, as well as a mean bone loss of 11.4% in patients with ALPSA tears vs. 4.3% for patients without ALPSA through arthroscopic measures.
Overall, 82% of patients were correctly identified as having an ALPSA lesion from the existing MRI/arthrography scans reviewed, according to the researchers.
Disclosure: The authors have no relevant financial disclosures.