title: Anatomical details of neurogenic heterotopic ossification anterior to the ankylotic hip.
abstract: Neurogenic heterotopic ossification (NHO) is a common complication in patients with spinal cord injury (SCI) and traumatic brain injury (TBI). Although there are many reports regarding the etiology, pathophysiology, and medical management, few studies elaborate the anatomical details of NHO, which leads to ankylosis of the hip joint. A prospective study on surgical resection of NHO in patients with hip ankylosis was conducted. Radiography and magnetic resonance imaging (MRI) were used to assess the relationship of the NHO block with the blood vessels, peripheral nerve, and surrounding muscles and bones. The anatomical relationships were also assessed and documented during the surgical procedures. NHO, which is anterior to the hip and causes hip ankylosis, settles into tissue planes without involving the tissue itself and does not disrupt the femoral neurovascular structures. The NHO bone block can then fuse to the cortex of adjacent bone. During resection, the normal bony contour should be exposed as a marker to guide the resection in order to avoid iatrogenic fracture.
authors.affiliation: School of Rehabilitation Medicine, Capital Medical University, Beijing, People's Republic of China; Department of Orthopedics and Rehabilitation, Beijing Charity Hospital, Beijing 100068, People's Republic of China. Electronic address: keminlqliu@sina.com.
authors.forename: Kemin
authors.initials: K
authors.lastname: Liu
authors.affiliation: School of Rehabilitation Medicine, Capital Medical University, Beijing, People's Republic of China; Department of Orthopedics and Rehabilitation, Beijing Charity Hospital, Beijing 100068, People's Republic of China.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Cui
authors.affiliation: School of Rehabilitation Medicine, Capital Medical University, Beijing, People's Republic of China; Department of Orthopedics and Rehabilitation, Beijing Charity Hospital, Beijing 100068, People's Republic of China.
authors.forename: Sihai
authors.initials: S
authors.lastname: Liu
authors.affiliation: School of Rehabilitation Medicine, Capital Medical University, Beijing, People's Republic of China; Department of Orthopedics and Rehabilitation, Beijing Charity Hospital, Beijing 100068, People's Republic of China.
authors.forename: Xinzuo
authors.initials: X
authors.lastname: Han
authors.affiliation: School of Rehabilitation Medicine, Capital Medical University, Beijing, People's Republic of China; Department of Orthopedics and Rehabilitation, Beijing Charity Hospital, Beijing 100068, People's Republic of China.
authors.forename: Fei
authors.initials: F
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000844:Ankylosis / Q000473:pathology* / Q000601:surgery; D001930:Brain Injuries / Q000601:surgery; D006621:Hip Joint / Q000033:anatomy & histology* / Q000098:blood supply / Q000601:surgery*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D019635:Neurosurgical Procedures / Q000379:methods; D009999:Ossification, Heterotopic; D013119:Spinal Cord Injuries / Q000473:pathology / Q000601:surgery*; D016896:Treatment Outcome; D055815:Young Adult
keywords: Anatomy; Ankylosis; Hip joint; Neurogenic heterotopic ossification