Abstract
Thirty-seven spinal cord injury patients admitted in the Nagasaki Rosai Hospital were investigated concerning the incidence and the sites of heterotopic ossification (HO). The incidence of HO was 65% in all patients. There was no difference in the incidence of HO between patients with cervical cord lesion and thoracic cord lesion. HO was most frequently seen in the hip joint with the incidence of 49% of all patients. The incidence of HO was 83% in the flaccid cases and 36% in the spastic cases. HO appeared in almost all the cervical cord injury patients with flaccid paralysis. Neither the age of patients nor the period after the injury was related to the occurrence of HO.
