Fig. 2
a Case 9: MRI performed after admission showed high signal intensity in the right SIJ and adjacent muscles with abscess formation and bone oedema. b CT revealed widening of the joint space, cavitations and sequestrum formation. c Postoperative radiograph revealed good position of the cage and screws. The patient was allowed to bear weight with assistance after 6 weeks and to fully bear weight after 4 months, after confirmation of bony fusion of the joint. After 1 year, the patient had no complaints and was satisfied. d FU radiographs showed complete bony fusion of the joint. At the last FU visit (49 months postoperatively), she had excellent functional outcome, no pain and no limitations of daily activity. She returned to work and practised sport regularly