Pelvic avulsion fracture 2020-07-28T16:21:41Z Pelvic avulsion injuries can occur in both adolescents and adults when either the apophysis is not yet completely fused or the enthesis, i. e. the site of attachment of a tendon or ligament, cannot withstand the tractional force encountered. Anatomically, the enthesis refers to the site of insertion of a tendon or ligament and the adjacent tissues which are functionally related. Avulsion fractured pelvic region of trunk An avulsion fracture (i.e., a type of fracture in which a piece of bone tears away from the site where the muscle attaches to the bone) of a bone of the pelvis. Pelvis fracture Avulsion fracture