Spine, Discs and Cord Compression
Evaluate degenerative, traumatic, infective and malignant spinal disease and its neural consequences.
How to prepare for the current Final FRCR Part A
Build general-radiology breadth, then practise integrating clinical context, anatomy, multimodality findings, technique and management to select the single best answer.
Core concepts
Concept 1
Localise by level and compartment, then assess alignment, vertebral bodies, discs, canal, cord, roots and paraspinal tissues.
Exam cue: Localise the abnormality and identify the organ, compartment, tissue or vessel before naming a diagnosis.
Concept 2
Use CT for complex bone and acute trauma, MRI for cord, roots, marrow, discs, infection and epidural disease.
Exam cue: Use age, clinical setting, tempo and the complete multimodality pattern to rank the most likely explanation.
Concept 3
Escalate cord or cauda equina compression, unstable trauma, epidural abscess and malignant collapse promptly.
Exam cue: Select the examination or intervention that changes management while accounting for contrast, radiation, access and urgency.
Concept 4
Apply normal and variant anatomy, modality technique, image quality and relevant imaging science to spine, discs and cord compression.
Risk pitfalls and guardrails
Reporting severe degenerative appearances without proving that level and side explain the current neurological syndrome.
Guardrail: Do not anchor on one remembered sign; verify age, localisation, distribution, technique, alternatives and management consequence.
Do not choose a merely plausible SBA option before comparing every option with the full clinical and imaging context.
Guardrail: Re-read the command word and compare every option; the task is to select the best available answer, not the first plausible one.
Memory anchors
Cord compression report
State cause, level, compartments, severity, cord signal and relevant additional disease.
Cauda equina imaging
Urgent MRI should cover the likely compressive region and not be delayed by a normal radiograph.
Discitis-osteomyelitis clue
Disc and adjacent endplate abnormality with inflammatory paraspinal or epidural change supports infection.
Spinal trauma instability
Assess all columns, alignment, posterior elements, canal compromise and ligamentous injury.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
A patient has acute urinary retention, saddle anaesthesia and bilateral leg weakness. MRI shows a large central L4-L5 disc extrusion compressing multiple cauda equina roots. What is the diagnosis?
At L4-L5, a posterolateral disc extrusion most commonly compresses which nerve root?
Answer all questions to submit.
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Move forward only after this module is stable.
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