Spine Disorders Practice Questions

Q: A 50-year-old male with a history of chronic low back pain presents with new-onset bowel and bladder incontinence. What is the next best step in management?

Urgent MRI of the spine. ***Urgent MRI of the spine*** - The new onset of **bowel and bladder incontinence** in a patient with chronic low back pain is highly suggestive of **cauda equina syndrome**. This is a surgical emergency. - An **urgent MRI** is crucial to confirm the diagnosis and identify the level of compression, guiding immediate surgical decompression to prevent permanent neurological deficits. *Conservative management with NSAIDs* - This approach is appropriate for routine, uncomplicated low back pain, but it is entirely inadequate for a **neurological emergency** like potential cauda equina syndrome. - Delaying definitive diagnosis and treatment in such cases can lead to irreversible neurological damage, including chronic incontinence and paralysis. *Bed rest* - While bed rest might be recommended for acute exacerbations of certain types of back pain, it is not a primary treatment for neurologic emergencies and will not resolve the underlying compression causing **cauda equina syndrome**. - Prolonged bed rest can also lead to complications like deconditioning and venous thromboembolism, and it would waste critical time for diagnosis and intervention. *Physical therapy* - Physical therapy is a cornerstone of management for chronic low back pain and for rehabilitation after an acute event once stability is achieved. - However, in cases of suspected **cauda equina syndrome**, physical therapy is contraindicated as an initial step because it does not address the acute spinal cord or nerve root compression and may worsen the condition or delay necessary surgical intervention.

Q: Which radiological feature is a hallmark of adolescent idiopathic scoliosis?

Rotational deformity of the vertebrae. ***Rotational deformity of the vertebrae*** - **Adolescent idiopathic scoliosis** is characterized by a 3D spinal deformity, and an axial **rotational deformity of the vertebrae** is a hallmark finding on imaging. - This rotation contributes to the rib hump seen on physical examination and is crucial for measuring the severity of the scoliosis curve using methods like the **Cobb angle**. *Lytic lesions* - **Lytic lesions** indicate areas of bone destruction, often associated with tumors, infections like osteomyelitis, or metabolic bone diseases. - They are not characteristic findings in **idiopathic scoliosis**, which is a structural deformity rather than a destructive process. *Vertebral collapse* - **Vertebral collapse** (or compression fractures) is typically caused by trauma, osteoporosis, or metastatic disease, leading to a reduction in vertebral body height. - This is not a feature of **adolescent idiopathic scoliosis**, where the vertebral bodies generally maintain their structural integrity, albeit with rotation. *Sclerotic lesions* - **Sclerotic lesions** refer to areas of increased bone density, which can be seen in conditions like osteoblastic metastases, Paget's disease, or chronic stress responses. - They are not a characteristic radiological finding in **adolescent idiopathic scoliosis**, where the primary issue is spinal curvature and vertebral rotation.

Q: A 35-year-old male presents with sharp pain in his lower back radiating to the posterior thigh and leg. Physical examination reveals a positive straight leg raise test. Which nerve root is most likely affected?

L5. ***L5*** - Pain radiating to the **posterior thigh and leg**, coupled with a positive **straight leg raise test**, is highly indicative of **sciatic nerve root compression** [1]. - **L5 nerve root compression** is a common cause of sciatica, affecting sensation along the lateral leg and dorsum of the foot, and motor function of the foot extensors [1]. *L2* - **L2 nerve root compression** typically causes pain in the **proximal thigh** (groin and anterior aspects), not radiating to the posterior thigh and leg. - Motor deficits would primarily involve hip flexion (psoas muscle), which is not suggested by the symptoms. *L3* - **L3 nerve root compression** presents with pain radiating to the **anterior thigh** and possibly the knee, and often affects the sensation on the medial aspect of the thigh and knee [1]. - Weakness can be seen in quadriceps (knee extension), which is not the primary complaint here. *L4* - **L4 nerve root compression** typically causes pain radiating to the **anterior thigh** and **medial leg**, often accompanied by sensory deficits in these areas and weakness in quadriceps (knee extension) and ankle dorsiflexion [1]. - The radiating pain described is more consistent with a lower lumbar nerve root.

Q: A 70-year-old woman with a history of osteoporosis presents with sudden severe back pain after lifting a heavy object. What is the most likely diagnosis?

Vertebral compression fracture. ***Vertebral compression fracture*** - The patient's age (70 years), history of **osteoporosis**, and sudden severe back pain after lifting a heavy object are classic signs of a **vertebral compression fracture**. - **Osteoporosis** significantly weakens bones, making them susceptible to fracture from minor trauma or even routine activities. *Lumbar muscle strain* - While lifting can cause **muscle strain**, the combination of **osteoporosis** and severe sudden pain points more strongly to a skeletal injury. - Muscle strains typically cause localized pain that might be exacerbated by movement but usually doesn't present as sudden, severe pain following a 'heavy object' lift in an osteoporotic patient. *Herniated disc* - A **herniated disc** typically presents with radiating pain down the leg (**sciatica**), numbness, or weakness, which are not mentioned in this scenario. - Although heavy lifting can precipitate a herniated disc, the patient's age and osteoporosis history make a compression fracture more likely. *Spinal stenosis* - **Spinal stenosis** usually causes pain that radiates down the legs and worsens with walking (**neurogenic claudication**), improving with sitting or leaning forward. - It's a chronic condition and does not typically present as sudden, severe back pain triggered by a single lifting event.

Q: What is the characteristic postural deformity observed in advanced ankylosing spondylitis?

Kyphosis. **Kyphosis** - In advanced **ankylosing spondylitis**, progressive inflammation and fusion of the vertebrae, especially in the thoracic spine, lead to a characteristic **forward curvature** of the upper back. - This results in a **stooped posture**, often described as a **\"bamboo spine\"** due to ossification of spinal ligaments, making kyphosis the typical deformity. *Increased lumbar lordosis* - While some individuals might initially compensate with increased lumbar lordosis, the overall progression of ankylosing spondylitis typically leads to a **flattening of the lumbar curve** and subsequent development of kyphosis in the thoracic spine. - The characteristic deformity in advanced disease is not an increased lumbar lordosis but rather a **loss of lumbar lordosis** and development of thoracic kyphosis. *Scoliosis* - **Scoliosis** involves a **lateral curvature** of the spine and is not a typical characteristic deformity of advanced ankylosing spondylitis. - Although some individuals might have an associated mild scoliosis, it is not the primary or defining postural change in this condition. *Spinal hyperextension* - **Spinal hyperextension** refers to an excessive backward bending of the spine, which is the opposite of the forward-stooped posture seen in advanced ankylosing spondylitis. - The hallmark of advanced ankylosing spondylitis is limited spinal mobility and a **flexion deformity**, not hyperextension.

Q: Which radiographic sign is characteristic of scoliosis?

Cobb angle. ***Cobb angle*** - The **Cobb angle** is the primary method used to quantify the magnitude of **spinal curvature** in scoliosis. - It is measured on **anterior-posterior radiographs** by drawing lines along the superior endplate of the uppermost vertebra and the inferior endplate of the lowermost vertebra involved in the curve, and then measuring the angle formed by their perpendiculars. *Jones angle* - The **Jones angle** is not a standard radiographic measure used in the diagnosis or classification of **scoliosis**. - This term is not typically used in musculoskeletal radiology for spinal deformities. *Tilleaux sign* - The **Tillaux fracture** (or **Tillaux-Chaput fracture**) is a **Salter-Harris type III fracture** of the **anterolateral distal tibial epiphysis** in adolescents. - It involves the anterolateral portion of the distal tibial physis and occurs due to asymmetric physeal closure. - It is not related to the assessment or measurement of **spinal curvature** in scoliosis. *Garden classification* - The **Garden classification** is used to categorize **femoral neck fractures** based on the displacement of the fracture fragments. - It is not relevant to the assessment or measurement of **spinal deformities** like scoliosis.

Q: A 14-year-old girl presents with a curvature of the spine that progresses with growth. Which condition is she likely to have?

Scoliosis. ***Scoliosis*** - **Scoliosis** is a sideways curvature of the spine, most commonly diagnosed in adolescents, and often progresses during periods of rapid growth. - The presentation of a **progressive spinal curvature** in a 14-year-old girl is a classic description of adolescent idiopathic scoliosis. *Kyphosis* - **Kyphosis** is an exaggerated outward curve of the thoracic spine, leading to a "hunchback" appearance. - While it is a type of spinal curvature, it is distinct from the **lateral-rotational curve** seen in scoliosis. *Lordosis* - **Lordosis** is an exaggerated inward curve of the lumbar spine, often resulting in a prominent abdomen and buttocks. - It refers to an increase in the normal anterior convexity of the lumbar spine, not a lateral curvature. *Spondylolisthesis* - **Spondylolisthesis** is a condition where one vertebra slips forward over another. - While it can cause back pain and sometimes lead to changes in spinal alignment, it is primarily a **vertebral slippage** rather than a rotational or lateral curvature of the entire spine.

Q: During an examination of the back, a palpable step-off in the lower lumbar region suggests a disruption of which structure?

Vertebral body disruption. ***Vertebral body disruption*** - A palpable **step-off** in the lumbar region often indicates **spondylolisthesis**, where one **vertebra** slips forward over the one below it. This slippage is fundamentally a **disruption of the vertebral body's** alignment. - This condition commonly results from a defect or fracture in the **pars interarticularis** or from degenerative changes, leading to the displacement of the **vertebral body**. *Intervertebral disc disruption* - **Intervertebral disc** disruption, such as a herniation, typically causes pain and neurological symptoms but does not directly result in a **palpable step-off** of the vertebral column. - While disc issues can contribute to spinal instability, the disc itself does not create the physical misaligned feeling of a **step-off**. *Ligamentum flavum injury* - Injury to the **ligamentum flavum** (e.g., hypertrophy, rupture) can lead to **spinal stenosis** or instability. - However, it does not typically manifest as a **palpable step-off** on physical examination, as it primarily affects the confines of the **spinal canal**. *Facet joint injury* - **Facet joint injury** or degeneration can cause localized back pain and reduce spinal mobility. - While it contributes to overall spinal stability, isolated **facet joint injury** alone is unlikely to cause a noticeable **palpable step-off**, which is a more significant structural displacement.

Q: A 40-year-old athlete experiences sudden back pain while lifting heavy weights. An MRI reveals a herniated lumbar disc. What is the best initial management?

Physical therapy. ***Physical therapy*** - **Physical therapy** is a cornerstone of initial management for most herniated lumbar discs, aiming to reduce pain, improve mobility, and strengthen supporting muscles. - It involves exercises, stretching, and education on proper body mechanics to prevent recurrence. *Surgical discectomy* - **Surgical discectomy** is generally reserved for patients with persistent, severe pain that has not responded to conservative treatments, or those with progressive neurological deficits like foot drop. - It is not considered the **best initial management** given that most herniated discs resolve with conservative care. *Corticosteroid injections* - **Corticosteroid injections** can provide temporary pain relief by reducing inflammation around the nerve root. - However, they are typically used as an adjunct to physical therapy or when initial conservative measures are insufficient, not as the primary initial management. *Bed rest for 2 weeks* - **Prolonged bed rest** is generally discouraged for disc herniations as it can lead to muscle deconditioning, increased stiffness, and actually prolong recovery. - **Limited rest** for a day or two may be appropriate for acute pain, but active rehabilitation through physical therapy is preferred for long-term recovery.

Q: The angle shown in the image is known as:

Cobb angle. ***Cobb angle*** - This is the standard method for measuring the **severity of scoliosis** on an X-ray. - It is determined by drawing lines parallel to the most tilted vertebrae above and below the apex of the curve and then measuring the angle formed by the intersection of perpendiculars to these lines. *Bohler angle* - The **Bohler angle** is measured on a lateral foot X-ray and is used to assess for **calcaneal fractures**. - A normal Bohler angle is typically between 20° and 40°, with values below 20° suggesting a calcaneal fracture. *Ferguson angle* - The **Ferguson angle**, also known as the **lumbosacral angle**, measures the inclination of the sacrum. - It is used to evaluate **lumbosacral alignment** and pathologies like spondylolisthesis. *Baumann angle* - The **Baumann angle** is measured on an anteroposterior X-ray of the elbow, specifically in children with **supracondylar humerus fractures**. - It is formed by a line extending along the lateral humeral condylar physis and a line along the lateral humeral cortex.

Question 1

A 50-year-old male with a history of chronic low back pain presents with new-onset bowel and bladder incontinence. What is the next best step in management?

Accepted Answer

Urgent MRI of the spine

Answer

Conservative management with NSAIDs

Answer

Bed rest

Answer

Physical therapy

Question 2

Which radiological feature is a hallmark of adolescent idiopathic scoliosis?

Accepted Answer

Rotational deformity of the vertebrae

Answer

Lytic lesions

Answer

Vertebral collapse

Answer

Sclerotic lesions

Question 3

A 35-year-old male presents with sharp pain in his lower back radiating to the posterior thigh and leg. Physical examination reveals a positive straight leg raise test. Which nerve root is most likely affected?

Accepted Answer

L5

Answer

L2

Answer

L3

Answer

L4

Question 4

A 70-year-old woman with a history of osteoporosis presents with sudden severe back pain after lifting a heavy object. What is the most likely diagnosis?

Accepted Answer

Vertebral compression fracture

Answer

Lumbar muscle strain

Answer

Herniated disc

Answer

Spinal stenosis

Question 5

What is the characteristic postural deformity observed in advanced ankylosing spondylitis?

Accepted Answer

Kyphosis

Answer

Scoliosis

Answer

Increased lumbar lordosis

Answer

Spinal hyperextension

Question 6

Which radiographic sign is characteristic of scoliosis?

Accepted Answer

Cobb angle

Answer

Jones angle

Answer

Tilleaux sign

Answer

Garden classification

Question 7

A 14-year-old girl presents with a curvature of the spine that progresses with growth. Which condition is she likely to have?

Accepted Answer

Scoliosis

Answer

Kyphosis

Answer

Lordosis

Answer

Spondylolisthesis

Question 8

During an examination of the back, a palpable step-off in the lower lumbar region suggests a disruption of which structure?

Accepted Answer

Vertebral body disruption

Answer

Intervertebral disc disruption

Answer

Ligamentum flavum injury

Answer

Facet joint injury

Question 9

A 40-year-old athlete experiences sudden back pain while lifting heavy weights. An MRI reveals a herniated lumbar disc. What is the best initial management?

Accepted Answer

Physical therapy

Answer

Surgical discectomy

Answer

Corticosteroid injections

Answer

Bed rest for 2 weeks

Question 10

The angle shown in the image is known as:

Accepted Answer

Cobb angle

Answer

Bohler angle

Answer

Ferguson angle

Answer

Baumann angle

Spine Disorders — MCQs

Spine Disorders — MCQs

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