Central nervous system and head and neck

FRCR 2A CNS and Head & Neck Revision Guide

A practical FRCR 2A CNS and head-and-neck guide covering brain, spine, orbit, temporal bone, neck spaces, vascular imaging and revision strategy.

Editorial review: The 2A Bank Clinical EditorLast reviewed: August 2026How we review content

Independent guide: The RCR does not publish a fixed number of questions for each curriculum area. Use this page to organise broad preparation, then check the current candidate guidance and clinical radiology curriculum.

How to think about this curriculum area

This curriculum area combines brain, spine, eyes and orbits, temporal bone, sinonasal, salivary, dental and neck imaging. Questions often demand precise localisation before diagnosis: compartment, cranial-nerve segment, vessel relationship or direction of space displacement can be decisive.

The best revision approach moves from anatomy and localisation to pathology and clinical consequence. Pattern recognition matters, but so do treatment effects, vascular architecture, emergency complications and the limitations of advanced MRI techniques.

What the area includes

  • Stroke, haemorrhage, vascular malformations and intracranial vascular imaging
  • Tumour, infection, inflammation, demyelination, toxic-metabolic and neurodegenerative disease
  • Spinal cord, intradural, extradural, degenerative and postoperative imaging
  • Orbit, visual pathways, skull base and cranial nerves
  • Temporal bone, hearing loss, tinnitus and postoperative ear imaging
  • Sinonasal, salivary, mucosal, dental and deep-neck-space disease

Common single-best-answer tasks

Localise before diagnosing

Decide intra-axial versus extra-axial, cord compartment, cranial-nerve segment, mucosal versus deep space, or prestyloid versus poststyloid origin before comparing pathologies.

Interpret sequence behaviour

Diffusion, susceptibility, perfusion, spectroscopy, enhancement and fat suppression are useful only when tied to morphology and clinical timing. Avoid treating one sequence as diagnostic in isolation.

Recognise architecture and vessel relationships

In vascular and skull-base questions, the presence of a nidus, venous drainage, vessel displacement, flow voids or foraminal route may distinguish entities that otherwise enhance similarly.

Separate treatment effect from active disease

Radiotherapy, surgery, embolisation and device treatment create appearances that overlap recurrence or complication. Timing and advanced imaging limitations frequently form the learning point.

A practical revision framework

1

Start with anatomy and compartments

Revise ventricles, cisterns, vascular territories, skull-base foramina, cranial nerves, spinal compartments and neck spaces through cases. Precise anatomy makes difficult questions manageable.

2

Group disease by imaging pattern

Compare ring enhancement, restricted diffusion, haemorrhagic lesions, white-matter patterns, leptomeningeal disease and spinal cord signal rather than learning diagnoses one by one.

3

Use clinical timing

The interval after stroke, haemorrhage, infection, surgery or radiotherapy changes signal and differential diagnosis. Add timing explicitly to revision notes.

4

Keep head and neck visible

Protect regular sessions for temporal bone, orbit, sinonasal, salivary and neck-space imaging. A neuro-heavy revision plan can still leave a large portion of this combined area weak.

Common revision mistakes

  • Naming a lesion before identifying its compartment or site of origin
  • Treating restricted diffusion as specific for one diagnosis
  • Calling simple vascular contact neurovascular compression without nerve distortion or compatible context
  • Using neck-space displacement rules without integrating vessel and gland relationships
  • Allowing brain MRI revision to crowd out spine, temporal bone, orbit and mucosal head-and-neck imaging

Readiness checklist

  • I can localise lesions by compartment before applying a differential.
  • I can interpret diffusion and susceptibility in the context of timing and morphology.
  • I can distinguish major vascular architectures and abnormal venous drainage patterns.
  • I can recognise important stroke-perfusion and post-thrombectomy pitfalls.
  • I can trace cranial nerves and skull-base routes relevant to spread or symptoms.
  • I can localise deep-neck masses using fat, gland and vessel displacement.
  • I can distinguish common postoperative or post-radiotherapy appearances from complications.
  • My revision includes spine, orbit, temporal bone, sinonasal, salivary and dental imaging.

Frequently asked questions

Should I revise neuroradiology and head and neck separately?

Separate focused sessions are useful, but keep regular mixed blocks because the published curriculum combines CNS and head-and-neck content in one broad area.

How much advanced MRI physics is needed?

Understand the clinical interpretation and limitations of diffusion, susceptibility, perfusion, spectroscopy and common artefacts. Prioritise decisions that change the differential or next step.

What is the best way to learn neck spaces?

Use actual masses and describe the displaced fat, glands and carotid-space vessels. Applied localisation is more durable than memorising a direction table alone.

Continue your FRCR 2A preparation

Put the technique into practice

Try a free full-length FRCR 2A mock: 120 questions across all six curriculum areas, with flexible timing, immediate results and detailed answer review.