Glenoid hypoplasia, or dysplasia of the scapular neck, is usually a bi
lateral and symmetric finding. Associated findings include hypoplasia
of the humeral head, elongation of the glenoid cavity, and alterations
in the shape of the coracoid or clavicle. Glenoid hypoplasia has been
reported sporadically in the radiologic literature, but the condition
may be more frequent than previously thought. In this paper, we discu
ss the radiographic findings of glenoid hypoplasia and explore the pos
sibility of an association between glenoid hypoplasia and shoulder ins
tability.