Orthopedic Spine Review | Dr Hutaif Spine Surgery Revie -...

A 65-year-old female with long-standing, severe rheumatoid arthritis presents with progressive clumsiness in her hands and difficulty walking. Flexion-extension radiographs of the cervical spine demonstrate atlantoaxial instability. Which of the following radiographic parameters is the most reliable predictor of neurologic recovery following posterior surgical stabilization?

In the assessment of spinopelvic parameters for a patient undergoing surgical correction for adult spinal deformity, Pelvic Incidence (PI) is considered a fixed morphological parameter once skeletal maturity is reached. PI is mathematically defined as the algebraic sum of which two parameters?

A 45-year-old male presents with severe, burning right leg pain radiating down the anterior thigh to the medial aspect of his lower leg. Motor examination reveals 4/5 strength in knee extension. MRI of the lumbar spine reveals a far lateral (extraforaminal) disc herniation at the L4-L5 level on the right side. Which nerve root is most likely compressed?

A 72-year-old man with known cervical spondylosis sustains a hyperextension injury to his neck in a low-speed motor vehicle collision. He presents to the emergency department with profound weakness in his bilateral upper extremities, particularly the hands, but retains 4/5 strength in his lower extremities. Perianal sensation and rectal tone are intact. What is the most likely diagnosis?

A 30-year-old construction worker falls from a height of 10 feet, sustaining an L1 burst fracture. Neurological examination is completely normal (intact). MRI demonstrates no disruption of the posterior ligamentous complex (PLC). According to the Thoracolumbar Injury Classification and Severity (TLICS) score, what is this patient's total score?

A 58-year-old male with a history of metastatic renal cell carcinoma (RCC) presents with severe mechanical back pain and progressive paraparesis. MRI reveals high-grade epidural spinal cord compression at T8 from a metastatic lesion, but the spine is mechanically stable. According to the NOMS (Neurologic, Oncologic, Mechanical, and Systemic) framework, what is the most appropriate management?

A 24-year-old male is involved in a high-speed rollover collision. CT of the cervical spine reveals a Type II odontoid fracture with a reverse obliquity fracture line (sloping from anterior-inferior to posterior-superior). Which of the following surgical interventions is considered the MOST appropriate for this fracture pattern?

A 60-year-old male presents with progressive cervical spondylotic myelopathy localizing to the C3-C6 levels. Upright lateral cervical radiographs demonstrate a rigid cervical kyphosis of 18 degrees. Which of the following is the most appropriate primary surgical approach?

A 22-year-old female was a lap-belt restrained back-seat passenger in a high-speed frontal collision. She arrives at the trauma bay complaining of severe back pain. Imaging demonstrates a flexion-distraction injury (Chance fracture) at L2. She is neurologically intact. Due to the mechanism of injury, which of the following concomitant injuries must be actively ruled out?

Which of the following describes the classic radiographic Sorensen criteria for the diagnosis of classic Scheuermann's Kyphosis?

In the Lenke classification system for Adolescent Idiopathic Scoliosis (AIS), a proximal thoracic curve is considered 'structural' if it meets which of the following radiographic criteria?

A 55-year-old diabetic male presents with unrelenting, severe lower back pain and fevers. MRI with gadolinium contrast reveals increased T2 signal and enhancement in the L3-L4 disc space and adjacent vertebral endplates. Blood cultures are drawn. What is the most common causative organism for spontaneous pyogenic spondylodiscitis in the adult population?

A 12-year-old gymnast is diagnosed with a high-grade (Meyerding Grade IV) L5-S1 dysplastic spondylolisthesis. She is planned for an instrumented reduction and interbody fusion. Which of the following nerve roots is at the highest risk of iatrogenic injury during the reduction maneuver?

A 62-year-old male with a 25-year history of Ankylosing Spondylitis presents to the emergency department complaining of new, severe back pain after slipping and falling on his buttocks. Initial plain radiographs of the thoracic and lumbar spine are interpreted as negative. What is the most appropriate next step in management?

A 14-year-old fast bowler presents with acute onset of lower back pain exacerbated by extension. MRI of the lumbar spine reveals bilateral acute pars interarticularis stress reactions (spondylolysis) at L5, with significant bone marrow edema but no spondylolisthesis. What is the most widely accepted initial treatment modality?

A 6-year-old girl is evaluated for bilateral cavovarus foot deformities and back pain. Physical examination reveals a sacral dimple with a hairy patch. MRI of the spine confirms the diagnosis of a tethered cord. To meet the radiographic definition of a tethered cord, the conus medullaris must terminate below which vertebral level in a child of this age?

In the context of spinal fusion biology, which of the following bone graft substitutes functions strictly via an osteoinductive mechanism without providing osteoconductive scaffolding or osteogenic cells?

A major complication of prolonged spine surgery in the prone position is perioperative visual loss (POVL). According to the ASA Postoperative Visual Loss Registry, what is the most common etiology of POVL in patients undergoing instrumented posterior spinal fusion?

In adult spinal deformity surgery, the fundamental goal of sagittal realignment is to achieve a harmonious relationship between the pelvis and the lumbar spine to minimize energy expenditure while standing. The globally accepted target for surgical correction dictates that the mismatch between Pelvic Incidence (PI) and Lumbar Lordosis (LL) should be:

During the neurological examination of a patient with suspected cervical myelopathy, you perform the inverted brachioradialis reflex test. Rapidly tapping the brachioradialis tendon yields an abnormal reflex consisting of spontaneous finger flexion without normal wrist extension and supination. This specific sign strongly localizes a compressive spinal cord lesion to which vertebral level?

A 65-year-old female presents with progressive difficulty walking and a 'pitched-forward' posture. Her full-length standing spine radiographs demonstrate a Pelvic Incidence (PI) of 62 degrees, Lumbar Lordosis (LL) of 25 degrees, Pelvic Tilt (PT) of 35 degrees, and a Sagittal Vertical Axis (SVA) of +12 cm. If surgical correction is planned, what is the ideal postoperative target for her Lumbar Lordosis (LL) to restore optimal spinopelvic sagittal balance?

A 25-year-old male is brought to the trauma bay after a high-speed motor vehicle collision. He complains of severe neck pain but is awake, alert, cooperative, and neurologically intact. Cervical spine radiographs reveal a bilateral C5-C6 facet dislocation. What is the most appropriate next step in management?

A 16-year-old male presents with cosmetic concerns regarding his back. Standing radiographs reveal a rigid thoracic kyphosis of 85 degrees with anterior wedging of 5 degrees or more across four consecutive vertebrae. The apex is at T8. Conservative management has failed. If posterior spinal fusion is planned, what are the standard recommended radiographic landmarks for the proximal and distal extent of the fusion construct?

A 55-year-old female with a history of breast cancer presents with severe, mechanically exacerbated back pain. Imaging demonstrates a lytic metastasis at L3. The Spine Oncology Study Group devised the Spinal Instability Neoplastic Score (SINS) to help guide surgical referral for spinal instability. Which of the following variables is NOT a component of the SINS criteria?

A neurologically intact 30-year-old male presents with back pain after a fall from a height of 10 feet. CT and MRI demonstrate an L1 burst fracture with 40% loss of vertebral body height, 15 degrees of kyphosis, and an intact posterior ligamentous complex (PLC). According to the Thoracolumbar Injury Classification and Severity (TLICS) score, what is his total score and the recommended management?

When performing an anterior approach to the lower cervical spine (e.g., C6-C7), approaching from the right side rather than the left increases the risk of injury to which of the following structures?

A 78-year-old male sustains a Type II odontoid fracture after a low-energy mechanical fall. Which of the following factors represents the greatest risk for nonunion if this injury is treated conservatively with a hard cervical collar?

A 62-year-old male with severe cervical myelopathy undergoes a posterior C3-C6 laminectomy and instrumented fusion. On postoperative day 3, the patient complains of an inability to elevate his right shoulder or flex his elbow, despite intact sensation and full strength in his hands and lower extremities. What is the most widely accepted primary pathophysiology for this specific complication?

A 68-year-old male with pre-existing cervical spondylosis presents after a hyperextension injury sustained when he tripped and struck his chin. Examination reveals 2/5 motor strength in his upper extremities and 4/5 motor strength in his lower extremities. Sensation is decreased globally below the clavicles. Based on this presentation, what is the expected pattern of motor recovery for this patient?

A 45-year-old male presents with vague sacral pain and bowel dysfunction. MRI reveals a large, destructive midline sacral mass. A CT-guided biopsy confirms a chordoma. Which of the following statements best characterizes the optimal treatment strategy for this pathology?

A 50-year-old male with a 20-year history of Ankylosing Spondylitis (AS) reports new-onset neck pain after a minor bump in a minor motor vehicle collision. Initial AP and lateral cervical radiographs obtained in the emergency department are read as negative for acute fracture. He is neurologically intact. What is the most appropriate next step in management?

A 2-year-old female is evaluated for congenital scoliosis secondary to a fully segmented hemivertebra at T8. Prior to proceeding with any surgical intervention for the deformity, what screening study is mandatory to evaluate for the most common associated neural axis anomalies?

During posterior instrumented spinal fusion, maximizing the pull-out strength of pedicle screws is critical to construct stability. Which of the following factors exerts the greatest influence on the pull-out strength of a pedicle screw?

A 35-year-old male sustains a severe neck injury in a motor vehicle accident. Radiographs reveal a traumatic spondylolisthesis of the axis (Hangman's fracture) characterized by severe angulation of the C2 body over C3, but with minimal translation. According to the Levine and Edwards classification, this is a Type IIA fracture. What is the primary mechanism of injury, and what intervention is strictly contraindicated during management?

A 14-year-old female gymnast complains of insidious onset, mechanical lower back pain over the last 3 months. Plain radiographs of the lumbar spine are completely normal. However, an MRI reveals hyperintense signal (bone marrow edema) in the pars interarticularis of L5 bilaterally on T2/STIR sequences, with no discrete fracture line visible on CT. What is the most appropriate initial management?

In the Lenke classification system for Adolescent Idiopathic Scoliosis (AIS), determining whether a curve is 'structural' or 'non-structural' is crucial for deciding which curves must be included in the fusion construct. To classify the Proximal Thoracic (PT) curve as structural, which of the following radiographic criteria must be met?

The Spine Patient Outcomes Research Trial (SPORT) evaluated surgical versus non-operative management for degenerative spondylolisthesis with spinal stenosis. Despite significant crossover between the assigned groups, what was the primary conclusion regarding patient outcomes at 4-year and 8-year follow-ups based on the 'as-treated' analysis?

In evaluating adult spinal deformity, the Sagittal Vertical Axis (SVA) is a critical radiographic measurement used to quantify global sagittal balance. How is the SVA defined on a standing lateral full-length spine radiograph?

A 52-year-old male with poorly controlled diabetes mellitus presents with 5 days of severe back pain, fevers, and malaise. His ESR is 85 mm/hr and CRP is elevated. MRI of the lumbar spine reveals an anterior epidural abscess extending from L3 to L5. Neurological examination is completely normal, with full strength, intact sensation, and normal bowel/bladder function. What is the most appropriate initial management?

A 60-year-old male with severe cervical spinal stenosis exhibits a positive Lhermitte's sign during a physical examination. What specific pathophysiological process does this clinical sign indicate?

What was the primary finding of the Spine Patient Outcomes Research Trial (SPORT) regarding degenerative spondylolisthesis treated surgically versus non-surgically?

An 82-year-old male sustains a Type II odontoid fracture with 2 mm of posterior displacement after a ground-level fall. He is neurologically intact. Which of the following treatments is associated with the highest survival rate for this specific patient demographic?

A 12-year-old premenarchal female with a Risser 0 score presents with an adolescent idiopathic scoliosis right thoracic curve of 32 degrees. Based on the BrAIST trial, what is the most appropriate management?

A 25-year-old male presents with incomplete quadriplegia following a diving accident. Radiographs reveal a C5-C6 bilateral facet dislocation. The patient is awake, alert, and fully cooperative. What is the most appropriate next step in management?

A 35-year-old male presents with acute back pain radiating to the dorsum of his left foot. Motor testing reveals 4/5 strength in extensor hallucis longus. A central and paracentral disc herniation at L4-L5 is suspected. Which nerve root is most likely affected by this paracentral herniation?

A 65-year-old male with long-standing ankylosing spondylitis presents with severe neck pain following a minor low-speed motor vehicle collision. Computed tomography reveals a displaced fracture through the C6-C7 disc space. What is the most common associated complication in this patient population that requires urgent evaluation?

A 4-year-old child presents to the emergency department after a fall. Lateral cervical spine radiographs demonstrate 3 mm of anterior displacement of C2 on C3. Which of the following radiographic lines is most useful to differentiate physiological pseudosubluxation from true traumatic instability?

A 40-year-old female presents with severe low back pain, bilateral lower extremity radicular pain, and altered perineal sensation. Which of the following clinical findings has the highest sensitivity for diagnosing cauda equina syndrome in this setting?

The Spinal Instability Neoplastic Score (SINS) is used to guide the need for surgical stabilization in metastatic spine disease. Which of the following criteria contributes points indicating a HIGHER risk of instability within the SINS scoring system?

A 14-year-old female undergoes surgical treatment for a high-grade dysplastic L5-S1 spondylolisthesis. The surgeon decides to perform an instrumented reduction of the slip prior to fusion. Which nerve root is at the highest risk of iatrogenic injury during the reduction maneuver?

A 55-year-old Asian male presents with progressive fine motor clumsiness and an unsteady gait. Imaging reveals continuous ossification of the posterior longitudinal ligament (OPLL) from C3 to C6, with a rigid kyphotic cervical alignment (K-line negative). Which surgical approach is most appropriate?

A 30-year-old male sustains a T12 burst fracture in a fall. He is neurologically intact. Imaging shows a 25% loss of vertebral body height, 15 degrees of local kyphosis, and an intact posterior ligamentous complex (PLC). According to the Thoracolumbar Injury Classification and Severity (TLICS) score, what is his total score?

A 15-year-old male presents with thoracic back pain and a prominent, rigid thoracic kyphosis. Radiographs are obtained to evaluate for Scheuermann's disease. According to Sorensen's criteria, the radiographic diagnosis requires anterior wedging of at least how many degrees in how many consecutive vertebrae?

A 6-year-old girl is diagnosed with Klippel-Feil syndrome based on a short neck, low posterior hairline, and limited cervical range of motion. Due to known syndromic associations, which of the following screening tests should be routinely ordered?

A 50-year-old male with a history of intravenous drug use presents with severe back pain, fever, and progressive lower extremity weakness over 48 hours. MRI reveals an extensive lumbar epidural abscess. What is the most common route of bacterial seeding to the epidural space in this adult demographic?

A 55-year-old male presents with severe mechanical back pain and a known history of renal cell carcinoma. Imaging reveals a lytic lesion in the L3 vertebral body. According to the Spinal Instability Neoplastic Score (SINS), what total score range defines a "potentially unstable" spine that warrants surgical consultation?

A 60-year-old male with progressive clumsiness in his hands and hyperreflexia undergoes an MRI of the cervical spine. The imaging demonstrates significant cervical stenosis with focal T2 hyperintensity and corresponding T1 hypointensity within the spinal cord at C4-C5. What is the prognostic significance of these MRI findings?

In surgical planning for adult spinal deformity, achieving specific spinopelvic parameters is highly correlated with improved Health-Related Quality of Life (HRQOL) outcomes. According to the SRS-Schwab classification, which of the following represents an optimal alignment goal?

A 25-year-old male presents with a C5-C6 bilateral facet dislocation after a motor vehicle accident. He is awake, alert, cooperative, and has no neurological deficits. What is the most appropriate next step in management?

A 55-year-old female with metastatic renal cell carcinoma to the T8 vertebral body presents with severe back pain and progressive bilateral leg weakness. MRI shows high-grade epidural spinal cord compression. Based on the NOMS framework, what is the optimal management strategy?

A 30-year-old male falls from a height of 10 feet. CT demonstrates an L1 burst fracture. His neurological examination is completely normal. MRI confirms that the posterior ligamentous complex (PLC) is intact. What is his Thoracolumbar Injury Classification and Severity (TLICS) score, and what is the recommended treatment?

A 28-year-old male presents following a high-speed collision. Imaging reveals a traumatic spondylolisthesis of the axis (Hangman's fracture). The fracture shows severe angulation but minimal translation, and the angulation worsens significantly with longitudinal traction. What is the Levine-Edwards classification and appropriate management?

A 65-year-old male undergoes a C3-C6 posterior cervical laminectomy and fusion for multilevel spondylotic myelopathy. On postoperative day 2, he develops profound unilateral deltoid and biceps weakness, but no lower extremity deficits. What is the most widely accepted etiology of this complication?

A 14-year-old gymnast presents with an L5-S1 isthmic spondylolisthesis with a 20% slip (Meyerding Grade I). She has severe, mechanically limiting back pain that has failed 6 months of comprehensive conservative management. Which of the following is the most appropriate surgical intervention?

A 12-year-old premenarchal female presents with an adolescent idiopathic scoliosis right thoracic curve of 25 degrees. Her Risser stage is 0. According to the Lonstein and Carlson criteria, what is her approximate risk of curve progression to a surgical magnitude (>50 degrees)?

A 68-year-old male with long-standing ankylosing spondylitis sustains a ground-level fall. He complains of severe lower neck pain, though his neurological exam is normal. Standard anteroposterior and lateral cervical radiographs are inconclusive due to deformity and poor visualization of the cervicothoracic junction. What is the most critical next step?

An 80-year-old female presents with severe, worsening back pain 3 months after a minor fall. Initial radiographs at the time of the fall were reported as normal. Current radiographs demonstrate severe vertebral body collapse at T12 with an intravertebral vacuum cleft. What is the most likely diagnosis?

A 45-year-old male immigrant presents with night sweats, back pain, and progressive paraparesis. MRI of the thoracic spine reveals extensive destruction of the anterior vertebral bodies of T8 and T9 with a large paraspinal abscess, yet the T8-T9 intervertebral disc space is relatively preserved. What is the most likely causative organism?

An 82-year-old male falls and sustains a Type II odontoid fracture. Imaging reveals that the dens is displaced 6 mm posteriorly. He is neurologically intact but in significant pain. What is the most appropriate definitive management for this patient?

A 50-year-old male presents with acute, severe right leg pain and weakness in ankle dorsiflexion and great toe extension. An MRI of the lumbar spine reveals a massive far lateral (extraforaminal) disc herniation at the L5-S1 level on the right. Which nerve root is primarily compressed, and what surgical approach is ideally utilized?