1. The clinical and post-mortem findings are described of a patient who sustained a hyperextension injury of the neck with paraplegia. 2. There was no radiological evidence of fracture: osteoarthritis of the spine was present. 3. Evidence is presented that the cord was damaged from behind by the lamina of the vertebra below a tear in the anterior longitudinal ligament

Aims. Traumatic central cord syndrome (CCS) typically follows a hyperextension injury and results in motor impairment affecting the upper limbs more than the lower, with occasional sensory impairment and urinary retention. Current evidence on mortality and long-term outcomes is limited. The primary aim of this study was to assess the five-year mortality of CCS, and to determine any difference in mortality between management groups or age. Methods. Patients aged ≥ 18 years with a traumatic CCS between January 2012 and December 2017 in Wales were identified. Patient demographics and data about injury, management, and outcome were collected. Statistical analysis was performed to assess mortality and between-group differences. Results. A total of 65 patients were identified (66.2% male (n = 43), mean age 63.9 years (SD 15.9)). At a minimum of five years’ follow-up, 32.3% of CCS patients (n = 21) had died, of whom six (9.2%) had died within 31 days of their injury. Overall, 69.2% of patients (n = 45) had been managed conservatively. There was no significant difference in age between conservatively and surgically managed patients (p = 0.062). Kaplan-Meier analysis revealed no significant difference in mortality between patients managed conservatively and those managed surgically (p = 0.819). However, there was a significant difference in mortality between the different age groups (< 50 years vs 50 to 70 years vs > 70 years; p = 0.001). At five years’ follow-up, 55.6% of the patient group aged > 70 years at time of injury had died (n = 15). Respiratory failure was the most common cause of death (n = 9; 42.9%). Conclusion. Almost one-third of patients with a traumatic CCS in Wales had died within five years of their injury. The type of management did not significantly affect mortality but their age at the time of injury did. Further work to assess the long-term functional outcomes of surviving patients is needed to generate more reliable prognostic information. Cite this article: Bone Joint J 2023;105-B(8):920–927

Proximal tibial epiphyseal injuries are rare. Reported incidence varies from 0.5 – 3% of epiphyseal injuries. Proximal tibial epiphysis is well protected unlike distal femoral epiphysis. Thus, the distal femoral injuries are 7 times more frequent than proximal tibial epiphyseal injuries.

Case Report: 12-year old boy, hit a pole at the bottom of a dry ski slope and presented to A& E within 20 minutes. He had a swollen, deformed knee and leg that was immobilised in a temporary splint. He had absent posterior tibial and dorsalis pedis pulses. Emergency manipulation under GA and further stabilised with K-wires, A/K Back Slab in 450 flexion. Distal pulses returned on table. K-wires were removed after 4 weeks and physiotherapy started. At 3 months, he was back to normal activities except sports. At 2 years, he was longer by 1 cm in left tibia, valgus of 120 at the knee, full ROM, no ligament laxity and reports occasional anterior knee pain.

Discussion: Posteriorly displaced proximal tibial Salter Harris II injuries are very rare. Emergency reduction and stabilisation, absence of popliteal artery tear had prevented the immediate complications. The late complications did not warrant a surgical intervention.

Aims. Traumatic central cord syndrome (CCS) typically follows a hyperextension injury and results in a motor impairment affecting the upper limbs more than the lower limbs, with occasional sensory impairment and urinary retention seen. Current evidence on mortality and long-term outcomes is limited. The primary aim of this study is to assess the five-year mortality of CCS, and to determine any difference in mortality between management groups or age. Patients and Methods. Patients ≥18 years with traumatic CCS between January 2012 and December 2017 in Wales were identified. Patient demographics and injury, management and outcome data was collected. Statistical analysis was performed to assess mortality and between group differences. Results. 65 patients were identified (66.2% male, mean age 63.9 years). At five-years follow-up, 32.3% (n=21) of CCS patients were dead. 6 (9.2%) patients had died within 31 days of their injury. 69.2% (n=45) of patients were managed conservatively and there was no significant difference (p=0.062) in age between conservatively and surgically managed patients. Kaplan-Meier analysis revealed no significant difference in mortality between patients managed conservatively compared to those managed surgically (log rank test, p=0.819). However, there was a significant difference (p=0.001) in mortality between the different age groups (<50 years vs 50–70 years vs >70 years). At five-years follow up, 55.6% of the patient group aged >70 years at time of injury were dead. Respiratory failure was the most common cause of death (n=9, 42.9%). Conclusion. Almost one third of patients with traumatic CCS in Wales were dead at five years following their injury. Management type did not significantly affect mortality, however age at time of injury did. Further work assessing the long-term functional outcomes of surviving patients is needed, to allow more reliable prognostic information and functional recovery predictions to be given

Twenty-two cases of paraplegia complicating injury of the cervical column have been reviewed. The vertebral injury may be due to flexion or hyperextension violence. Flexion injury—There are three types of flexion injury: 1) dislocation; 2) compression fracture of a vertebral body; 3) acute retropulsion of an intervertebral disc. Evidence is presented in support of the view that disc protrusion is the cause of the cord lesion when there is no radiographic evidence of bone injury, and in some cases at least when there is a compression fracture. Treatment is discussed and the indications for caliper traction and laminectomy are presented. Hyperextension injurv—There are two types of hyperextension injury: 1) dislocation; 2) injury to arthritic spines. Hyperextension injury of an arthritic spine is the usual cause of paraplegia in patients over fifty years of age. The mechanism of hyperextension injury is described. The possible causes of spinal cord injury, and its treatment, are discussed

Study design: Retrospective, descriptive study. Objectives: To describe the characteristics and outcomes of patients with spinal canal stenosis who suffer significant spinal cord injury (SCI) due to hyperextension injury of the cervical spine. To compare their characteristics and outcomes with all patients suffering traumatic cervical SCI and with the total cohort of patients admitted to a Spinal Injuries Unit for rehabilitation. Setting: Spinal Injuries Unit (SIU), Princess Alexandra Hospital, Brisbane. Methods: Demographic, injury and outcome data were obtained from an existing database and by review of the medical records of 575 patients admitted to and discharged from the SIU between July 1st, 1995 and July 1st 2002. Main outcome measures were: change in American Spinal Injury Association (ASIA) scale category, change in ASIA motor score, discharge Functional Independence Measure (FIM) score and change in FIM score, length of stay (LOS), primary means of mobility at discharge and discharge destination. Standard statistical methods were used to compare groups. Results: A total of 18 (3%) of the 575 patients were found to have cervical canal stenosis and hyperextension injury (the CCS/HI group). This represents 8% of the total group suffering traumatic injury to the cervical spinal cord (the total cervical trauma: TCT group, n = 225). This CCS/HI group was found to have a mean age at injury of 55.1 years compared to 37.1 and 37.8 years respectively for the TCT and total groups. Ninety-four percent of patients were found to have a neurological level at admission at C1–3 or C4–5 compared to 75.6% of the TCT group and only 5.6% of patients had an ASIA Impairment Category A lesion at admission compared to 38.7% of the TCT group. Falls (55.6%) was the most common cause of injury in the CCS/HI group with motor vehicle accidents (33.8%) most common in the TCT group. The mean change in ASIA motor score between admission and discharge was 34.7 compared to 20.4 for the TCT group. Degree of impairment (measured by a change in ASIA Category) improved in 28% of patients and mean change in total FIM score was 41.3. There was no difference seen with the TCT group. LOS was shorter for these patients (111.1 days vs. 161.6 days). The primary means of mobility at discharge was “walking” for 50% of this group (compared to 28.4% for the TCT group) while the next most common means of mobility was “power wheelchair” at 28% (17% of TCT group). Most patients (55.4%) were discharged to their previous home following rehabilitation and 22.3% were discharged to another rehabilitation unit or acute hospital. Conclusions: Patients with cervical spinal canal stenosis who suffer hyperextension injury constitute a distinct subgroup with the total group of traumatic cervical spinal cord injuries. This study suggests that they are older at the time of injury, have more rostral cervical injuries, are more likely to have incomplete injuries and that falls is the most common cause of injury. They have greater improvement in motor function but this does not appear to result in greater function at discharge as measured by the FIM. There appears to be a dichotomy with results for mobility at discharge with patients either being able to walk or requiring a power wheelchair. LOS in the SIU is shorter but a higher percentage are discharged to another hospital or rehabilitation unit

STUDY DESIGN: Retrospective, descriptive study. OBJECTIVES: To describe the characteristics and outcomes of patients with spinal canal stenosis who suffer significant spinal cord injury (SCI) due to hyperextension injury of the cervical spine. To compare their characteristics and outcomes with all patients suffering traumatic cervical SCI and with the total cohort of patients admitted to a Spinal Injuries Unit for rehabilitation. SETTING: Spinal Injuries Unit (SIU), Princess Alexandra Hospital, Brisbane. METHODS: Demographic, injury and outcome data were obtained from an existing database and by review of the medical records of 575 patients admitted to and discharged from the SIU between July 1st, 1995 and July 1st 2002. Main outcome measures were: change in American Spinal Injury Association (ASIA) scale category, change in ASIA motor score, discharge Functional Independence Measure (FIM) score and change in FIM score, length of stay (LOS), primary means of mobility at discharge and discharge destination. Standard statistical methods were used to compare groups. RESULTS: A total of 18 (3%) of the 575 patients were found to have cervical canal stenosis and hyperextension injury (the CCS/HI group). This represents 8% of the total group suffering traumatic injury to the cervical spinal cord (the total cervical trauma: TCT group, n = 225). This CCS/HI group was found to have a mean age at injury of 55.1 years compared to 37.1 and 37.8 years respectively for the TCT and total groups. Ninety-four percent of patients were found to have a neurological level at admission at C1-3 or C4-5 compared to 75.6% of the TCT group and only 5.6% of patients had an ASIA Impairment Category A lesion at admission compared to 38.7% of the TCT group. Falls (55.6%) was the most common cause of injury in the CCS/HI group with motor vehicle accidents (33.8%) most common in the TCT group. The mean change in ASIA motor score between admission and discharge was 34.7 compared to 20.4 for the TCT group. Degree of impairment (measured by a change in ASIA Category) improved in 28% of patients and mean change in total FIM score was 41.3. There was no difference seen with the TCT group. LOS was shorter for these patients (111.1 days vs. 161.6 days). The primary means of mobility at discharge was “walking” for 50% of this group (compared to 28.4% for the TCT group) while the next most common means of mobility was “power wheelchair” at 28% (17% of TCT group). Most patients (55.4%) were discharged to their previous home following rehabilitation and 22.3% were discharged to another rehabilitation unit or acute hospital. CONCLUSIONS: Patients with cervical spinal canal stenosis who suffer hyperextension injury constitute a distinct subgroup with the total group of traumatic cervical spinal cord injuries. This study suggests that they are older at the time of injury, have more rostral cervical injuries, are more likely to have incomplete injuries and that falls is the most common cause of injury. They have greater improvement in motor function but this does not appear to result in greater function at discharge as measured by the FIM. There appears to be a dichotomy with results for mobility at discharge with patients either being able to walk or requiring a power wheelchair. LOS in the SIU is shorter but a higher percentage are discharged to another hospital or rehabilitation unit

Ankylosing spondylitis (AS) is a progressive multisystem chronic inflammatory disorder. The hallmark of this pathological process is a progressive fusion of the zygapophyseal joints and disc spaces of the axial skeleton, leading to a rigid kyphotic deformity and positive sagittal balance. The ankylosed spine is unable to accommodate normal mechanical forces, rendering it brittle and susceptible to injury. Traumatic hyperextension injury of the cervical spine leading to atlantoaxial subluxation (AAS) in AS patients can often be fatal. We report a non-traumatic mechanism of injury in AS progressing to AAS attributable to persistent hyperextension, which resulted in fatal migration of C2 through the foramen magnum. Cite this article: Bone Joint J 2013;95-B:206–9

Treated conservatively, hyperextension injuries of the cervical spine have a poor outcome, but surgical treatment does not yet provide a realistic alternative. This study was prompted by the lack of classifications of cervical spondylosis and outcome studies of hyperextension in the literature, and the absence of a user-friendly neurological score. The retrospective study included 60 patients admitted over the last 12 years with hyperextension injuries and varying degrees of neurological deficit. The mean age of patients was 52 years and most had radiological evidence of cervical spondylosis. None had any neurological deficit before the accident. Injuries were sustained in falls in 56%, in motor vehicle accidents in 34%, in assaults in 8% and in sports injuries in 2%. The neurological deficits varied: 11% had complete lesions, 33% central cord syndrome, 18% motor complete-sensory incomplete, 33% motor incomplete-sensory incomplete. The nervous system was normal in 2%. The posterior columns were often involved, with loss of pro-prioception. In the majority of cases conservative treatment consisted of six weeks of light traction in gentle flexion, followed by mobilisation in an ABCO brace for six weeks. The results showed that the mean Asia score gain for the group treated conservatively was 23, for the surgically stabilised group 3 and the surgically- decompressed group 55. There was a 16% mortality rate. The mean time for rehabilitation was 5.5 months. Both the final outcome and the time to rehabilitation were extremely variable. We present a classification of cervical spondylosis and ways of measuring congenital and acquired spinal cord narrowing. We combine the Asia and Frankel scoring systems to give a user-friendly guide

Objectives. Loss of motion following spine segment fusion results in increased strain in the adjacent motion segments. However, to date, studies on the biomechanics of the cervical spine have not assessed the role of coupled motions in the lumbar spine. Accordingly, we investigated the biomechanics of the cervical spine following cervical fusion and lumbar fusion during simulated whiplash using a whole-human finite element (FE) model to simulate coupled motions of the spine. Methods. A previously validated FE model of the human body in the driver-occupant position was used to investigate cervical hyperextension injury. The cervical spine was subjected to simulated whiplash exposure in accordance with Euro NCAP (the European New Car Assessment Programme) testing using the whole human FE model. The coupled motions between the cervical spine and lumbar spine were assessed by evaluating the biomechanical effects of simulated cervical fusion and lumbar fusion. Results. Peak anterior longitudinal ligament (ALL) strain ranged from 0.106 to 0.382 in a normal spine, and from 0.116 to 0.399 in a fused cervical spine. Strain increased from cranial to caudal levels. The mean strain increase in the motion segment immediately adjacent to the site of fusion from C2-C3 through C5-C6 was 26.1% and 50.8% following single- and two-level cervical fusion, respectively (p = 0.03, unpaired two-way t-test). Peak cervical strains following various lumbar-fusion procedures were 1.0% less than those seen in a healthy spine (p = 0.61, two-way ANOVA). Conclusion. Cervical arthrodesis increases peak ALL strain in the adjacent motion segments. C3-4 experiences greater changes in strain than C6-7. Lumbar fusion did not have a significant effect on cervical spine strain. Cite this article: H. Huang, R. W. Nightingale, A. B. C. Dang. Biomechanics of coupled motion in the cervical spine during simulated whiplash in patients with pre-existing cervical or lumbar spinal fusion: A Finite Element Study. Bone Joint Res 2018;7:28–35. DOI: 10.1302/2046-3758.71.BJR-2017-0100.R1

1. The literature on paraplegia complicating hyperextension injuries of the cervical spine is reviewed, and the lack of any definite explanation of the mode of interference with cord function is noted. 2. A case is described in which a detailed dissection of the post-mortem specimen was carried out. On the basis of the findings it is suggested that one cause of the suppression of cord function in such injuries is thrombosis of the spinal arteries and liquefaction-necrosis of the cord

1) A case is reported of paraplegia with normal radiographic appearances in which cervical cord damage was shown at autopsy to have been due to hyperextension injury. 2) The mechanism of such injuries is discussed, together with the differential diagnosis from acute prolapse of an intervertebral disc. 3) The grave dangers of using the fully extended position of the cervical spine in the management of these cases is noted

1. Six patients suffering from spontaneous posterior interosseous paralysis are described. 2. Two were due to benign tumour and four due to traumatic neuritis, three of which were associated with minor hyperextension injuries to the elbow joint and one with long standing cubitus varus. 3. Surgical exploration was performed in each patient with recovery of nerve function

1. The literature on hyperextension injuries of the spine is briefly reviewed. 2. Such injuries in the cervical spine can be subdivided into five groups based on the pathological anatomy, based on the experience of fifty-one patients in the Spinal Injuries Centre for Victoria over the past five years. 3. Extension injuries of the thoraco-lumbar spine are discussed. They are rare and have a poor prognosis. 4. The importance of treatment based on sound clinical and pathological knowledge is emphasised, particularly in order that stable and unstable lesions may be recognised early and managed correctly

The case is reported of an elderly man with asymptomatic cervical spondylosis who sustained a minor hyperextension injury of the cervical spine when the brakes of a car were applied suddenly to avoid a collision. Within six hours marked swelling of the neck and severe dyspnoea developed, and a lateral radiograph showed the pharyngeal shadow displaced far forwards and a crack fracture of an anterior osteophyte. Tracheostomy and evacuation of a massive prevertebral haematoma were performed, with immediate relief. The case draws attention to the possibility of this serious complication of a "whiplash" type of injury

There have been many reports on fracture-dislocation of the lumbar spine in recent years. Hyperextension as a mechanism for fracture-dislocation in the thoracolumbar spine was first described by Holdsworth accounting for only less than 3 percent of all fractures of the spine. De Oliverira reported an unusual pattern of sagittal shear fracture-dislocation secondary to posterior impact injuries. Hyperextension injuries result in the disruption of all ligaments & supporting elements of the spine starting with the anterior column. Sagittal translation and comminution of the posterior elements are the most common radiographic findings. Computed Tomography can accurately demonstrate the destruction of the posterior elements, and MRI is able to demonstrate the anterior ligamentous disruption. Nearly all cases suffered from paraplegia known as lumberjack paraplegia or severe neurological deficit. A case of complete fracture-dislocation of the L4-5 resulting from hyperextensive injury without lumberjack paraplegia or neurological deficit is presented. The diagnosis & treatment will be discussed

Initial treatment of traumatic spinal cord injury remains as controversial in 2023 as it was in the early 19th century, when Sir Astley Cooper and Sir Charles Bell debated the merits or otherwise of surgery to relieve cord compression. There has been a lack of high-class evidence for early surgery, despite which expeditious intervention has become the surgical norm. This evidence deficit has been progressively addressed in the last decade and more modern statistical methods have been used to clarify some of the issues, which is demonstrated by the results of the SCI-POEM trial. However, there has never been a properly conducted trial of surgery versus active conservative care. As a result, it is still not known whether early surgery or active physiological management of the unstable injured spinal cord offers the better chance for recovery. Surgeons who care for patients with traumatic spinal cord injuries in the acute setting should be aware of the arguments on all sides of the debate, a summary of which this annotation presents.

Cite this article: Bone Joint J 2023;105-B(4):347–355.

Anatomy & Biomechanics. Lateral Collateral Ligament (LCL). Primary stabilizer to varus opening. Femoral attachment – proximal/posterior to lateral epicondyle. Fibular attachment – midway along lateral fibular head. Popliteus Complex. Important stabilizer to posterolateral rotation. Stabilizer to varus opening. Popliteus attachment on femur. 18mm anterior/distal to LCL. anterior fifth of popliteal sulcus. Popliteofibular ligament (PFL). originates at musculo-tendinous junction of popliteus. attaches at medial aspect of fibular styloid. Mid-Third Lateral Capsular Ligament. Secondary stabilizer to varus opening. Thickening of lateral midline capsule. Meniscotibial portion often injured. Segond injury. Biceps Femoris Complex. Short head of biceps. Long head of biceps. Lateral Meniscus. Injury Mechanism. Rarely isolated injury. Usually as a combined ligamentous injury. ACL/PLC. PCL/PLC. Knee Dislocation. Hyperextension. Varus blow. Noncontact twisting. Importance of injury. Grade III injuries do not heal. Lead to instability and osteoarthritis. Compromise cruciate ligament reconstructions. Diagnosis of LCL/PLC injury. History. Usually due to varus/hyperextension injuries. 15 % have a peroneal nerve injury. Usually combined ligamentous injury. Clinical exam. Varus stress test. External rotation recurvatum test. Posterolateral drawer test. Dial test. Reverse pivot shift test. Varus thrust gait. Radiographs. MRI. Arthroscopic evaluation. Treatment for acute posterolateral knee injuries. Acute grade I and II injuries. Brace 6 weeks. Full ROM. Partial weight bearing. Acute grade III injuries. Repair/reconstruct within 2 weeks after injury. Attempt anatomic repair. Each structure repaired individually. Consider augmentation in midsubstance tears. Anatomic reconstruction. Treatment For Chronic Grade III Injuries. Assess for varus alignment. Proximal tibial opening wedge osteotomy. Reassess after 6 months for need for soft tissue reconstruction. Anatomic reconsruction of posterolateral structures. Two tailed reconstruction of LCL, PFLand popliteus tendon. Biomechanically restores function of native ligaments