A female infant was delivered following an incomplete breech presentation. Four days after birth, it was noted that the child did not move her left arm. A radiograph of the left shoulder girdle was carried out, but no fractures were seen. The left arm was bandaged to the chest. Two weeks after birth, callus formation was visible and she was able to more her shoulder. One year later, she could elevate the arm fully although her left humerus was slightly deformed in valgus position.
