Fig. 4From: Association between anterior bone loss and anterior heterotopic ossification in hybrid surgerySerial postoperative radiographs of a 47-year-old man who underwent contiguous 2-level hybrid surgery at C5-C7. a and b The lateral radiographs show the anterior bone loss occurred at 6 months after surgery. c and d The 12-month and 35-month postoperative lateral radiographs show the anterior heterotopic ossification occurred after the non-progressive bone lossBack to article page