“…Radiographic signs of NHO recurrence have been mentioned in 82 ± 100% of the operated SCI patients, 45,49,173,174 although clinically signi®cant NHO would develop in only 17 ± 58% of the cases. 10,45,49,173,174,176 It has been suggested that the recurrence after resection can be reduced if NHO is removed only once the ®rst and second phase of the bone scan have normalized. 10,52,115,129,132 However, such a maturity rating does not guarantee that NHO recurrence is unlikely.…”