Pelvic avulsion fractures occur in children and adolescents because their muscles and tendons are stronger than the area of bone (the secondary ossification centers) where the tendons attach. These fractures occur after a strong and sudden muscle contraction, which pulls the bony insertion site off of the pelvis. This typically occurs in track athletes and soccer players, who frequently perform eccentric contractions. The most common pelvic avulsions are of the anterior superior iliac spine (ASIS) by the sartorius; of the anterior inferior iliac spine (AIIS) by the rectus femoris; and of the ischial tuberosity by the hamstrings.
Full Article - https://www.orthopaedia.com/pediatric-fractures-of-the-lower-extremities/#Pelvic-Avulsion
