Fig. 60.1
(a) X-ray and (b) CT scan showing an avulsion injury in the ischial tuberosity (ischial apophyseolysis), at the insertion of the hamstring muscles. Muscle contraction pulled off a portion of the cortex and radiographs usually show the loose ischial apophysis in the soft tissue
Fig. 60.2
(a and b) Roentgenogram and CT scan showing a cortical avulsion in the iliac spine, at the insertion of the rectus femoris
