Computed tomographic scans and magnetic resonance images of 111 normal
shoulders of children were reviewed to determine the normal glenoid v
ersion in the pediatric age population. Glenoid version varies with ag
e in this population, The glenoid is most retroverted during the first
2 years of life (-6.3+/-6.5 degrees) and by the end of the first deca
de of life reaches adult glenoid version (-1.7+/-6.4 degrees). The dif
ference between mean glenoid version in early life and mean glenoid ve
rsion at the end of the first decade of life was statistically signifi
cant (p = 0.0013). Our value determined for adult glenoid version agre
es with previous published data in the orthopedic and anthropologic li
terature. This study provides the normal baseline data for glenoid ver
sion in the pediatric age group.