The prevalence of a notch in the anterior margin of the glenoid
cavity of
236 scapulae (118 female, 118
male) was investigated. The notch was found in 129 scapulae (55%) and gave
rise
to a pear-shaped cavity.
In 107 scapulae (45%) the notch was absent, the shape of the cavity being
oval. No
sex difference was
found in the prevalence of the notch. If a distinct notch exists, the glenoid
labrum is not attached to bone at
the notch and is therefore liable to be sheared off (Bankart lesion).