Top 20 Most Examined Topics in FRCEM

Topic priority at a glance

The highest-yield FRCEM topics are not simply the commonest ED presentations. They are the areas where UK guidance gives clear thresholds, timings, escalation points, and disposition decisions. That makes them ideal for single best answer questions and highly relevant to day-to-day emergency practice.

For exam purposes, the most tested topics usually share three features:

• they are common in the ED
• they are strongly guideline-driven
• they contain a clear best next step

For clinical practice, these same topics matter because they are the presentations where delayed recognition, wrong sequencing, or poor safety-netting causes harm.

Guidance changes. Candidates should always cross-check current NICE, RCEM, Resuscitation Council UK, BTS, SIGN, and relevant specialty guidance. The themes and thresholds below reflect mainstream UK emergency medicine practice and the style in which these areas are commonly examined.

Why These Most Examined Topics Matter for FRCEM

These are the 20 topics most likely to generate marks across MRCEM SBA, FRCEM SBA, and FRCEM OSCE:

Key Definitions

For exam purposes, know the difference between:

• initial management and definitive management
• investigation of choice and first investigation
• observation and admission
• senior review and specialty referral
• guideline threshold and local variation

Also separate:

• adult and paediatric criteria
• anticoagulants and antiplatelets
• clinical possibility and best guideline-concordant answer

Essential Pathophysiology

The most examined ED topics are usually those where pathophysiology explains urgency:

• intracranial bleeding after head injury
• spinal instability after trauma
• occult serious bacterial infection in febrile children
• circulatory collapse in sepsis and haemorrhage
• hypoxia and ventilatory failure in asthma and COPD
• cerebral ischaemia in stroke
• myocardial ischaemia in ACS
• ongoing neuronal injury in status epilepticus
• ketosis, dehydration, and electrolyte disturbance in DKA
• hepatic injury after paracetamol overdose

Examiners often test whether you understand which physiological change creates the immediate threat and therefore determines the next step.

Clinical Presentation

High-yield presentations include:

• minor head injury with one key risk factor
• trauma with possible cervical spine injury
• febrile infant or toddler with one red or amber feature
• agitated patient requiring behavioural disturbance management
• major trauma with hypotension or pelvic injury
• chest pain with non-diagnostic initial ECG
• sudden focal neurology or transient neurological symptoms
• ongoing seizure activity despite first-line treatment
• breathless patient with severe asthma or possible PE
• vomiting, abdominal pain, and acidosis in diabetes
• overdose with uncertain timing
• child with bronchiolitis, croup, or wheeze
• vulnerable child with inconsistent injury history
• haematemesis or melaena with shock
• thunderclap headache or fever with meningism
• pregnant patient with pain and bleeding
• acute scrotal pain

Red Flags and High-Risk Features

Across these topics, repeatedly tested red flags include:

• reduced or deteriorating GCS
• focal neurological deficit
• physiological instability
• age-specific paediatric abnormal observations
• anticoagulation
• pregnancy
• immunosuppression
• very young age, especially under 3 months
• failure of first-line treatment
• safeguarding concerns
• need for transfer to specialist centre

Differential Diagnosis

FRCEM questions often look like one topic but test another. Common examples:

• head injury stem actually testing safeguarding or anticoagulation
• agitation stem actually testing hypoglycaemia, toxicology, or hypoxia
• fever in child stem actually testing meningococcal disease, UTI, or Kawasaki disease
• asthma stem actually testing tension pneumothorax or anaphylaxis
• chest pain stem actually testing aortic dissection or PE
• headache stem actually testing SAH, meningitis, or carbon monoxide exposure

Initial ED Assessment

For almost all high-yield topics, the safe exam approach is:

• ABCDE assessment
• identify immediate life threats
• treat first where appropriate
• apply the relevant decision rule or guideline
• decide on investigation, escalation, and disposition

In OSCEs, candidates lose marks by jumping to definitive diagnosis before showing structured assessment and early treatment.

Investigations

The commonest investigation themes are:

• CT head timing after head injury
• CT cervical spine in significant-risk trauma
• blood cultures and lactate in sepsis where indicated
• ECG and serial troponin in ACS
• CT brain and vascular imaging in stroke pathways
• blood gas in severe asthma, COPD, DKA, and sepsis
• paracetamol level at the correct time point
• D-dimer only in appropriate PE risk groups
• LP only when indicated and safe

The exam trap is over-investigation. If a validated rule says no imaging or no D-dimer, the best answer is often not to do it.

Management in the Emergency Department

The highest-yield management principle is sequencing. Examiners often ask for the next best step, not the whole pathway.

Below is the practical ranked revision core for each of the top 20 topics.

1. Head injury in adults and children

• CT is the acute imaging modality of choice when criteria are met.
• Do not choose skull X-ray in routine acute head injury assessment.
• Keep head injury and cervical spine rules separate.
• Know discharge requirements: responsible supervision, written advice, return precautions.
• Know when deterioration, focal neurology, or abnormal imaging mandates neuroscience discussion.

Typical SBA traps:

• treating aspirin monotherapy as equivalent to anticoagulation
• mixing adult and paediatric vomiting criteria
• choosing MRI or skull X-ray
• forgetting CT timing

2. Cervical spine injury and spinal assessment

• Canadian C-spine Rule applies to alert, stable patients and is not a universal trauma rule.
• High-risk factors: age 65 or over, dangerous mechanism, paraesthesia in extremities.
• Low-risk factors only permit assessment of active neck rotation; they do not clear the neck by themselves.
• If the patient cannot actively rotate the neck 45 degrees left and right, imaging is required.
• In adult significant-risk trauma, CT is usually first-line imaging rather than plain radiographs.
• During airway management, manual in-line stabilisation is the key practical point, while prioritising oxygenation and first-pass success.
• Use spinal motion restriction principles rather than reflex prolonged collar use.

Typical SBA traps:

• using low-risk factors as clearance
• choosing plain films in high-risk adult trauma
• confusing dangerous mechanism lists between head injury and C-spine rules

3. Fever in under 5s

Red features include:

• pale, mottled, ashen, or blue
• reduced response to social cues
• appears ill to a healthcare professional
• does not wake or does not stay awake
• weak, high-pitched, or continuous cry
• grunting
• moderate or severe chest indrawing
• reduced skin turgor
• bulging fontanelle
• neck stiffness
• status epilepticus
• focal neurological signs
• focal seizures
• non-blanching rash

Amber features include:

• pallor reported by parent or carer
• not responding normally to social cues
• no smile
• wakes only with prolonged stimulation
• decreased activity
• nasal flaring
• tachypnoea using age-specific NICE thresholds
• oxygen saturation 95% or less in air
• crackles in the chest
• dry mucous membranes
• poor feeding in infants
• capillary refill time 3 seconds or more
• fever for 5 days or more
• swelling of a limb or joint
• non-weight bearing limb or not using an extremity

• Risk stratification must lead to action: observe, investigate, treat, admit, or discharge with safety-netting.
• Always consider UTI, pneumonia, meningitis, sepsis, meningococcal disease, and Kawasaki disease where relevant.
• Do not use antipyretic response to distinguish serious from non-serious illness.
• Under 3 months with fever is a high-yield admission/escalation group.

Typical SBA traps:

• focusing on temperature alone and missing behaviour or perfusion
• discharging a young infant with fever and no clear plan
• forgetting safety-netting and parental advice

4. Sepsis and septic shock

• Recognise sepsis as life-threatening organ dysfunction due to infection.
• Think source, physiology, and organ dysfunction.
• Use NEWS2 in adults as part of assessment, but do not let a score replace clinical judgement.
• In children, use age-specific observations and concern about appearance, perfusion, and behaviour.
• Take cultures where appropriate, but do not delay antibiotics in septic shock or high-risk sepsis.
• Give oxygen if hypoxic, IV access, bloods, lactate, fluids where indicated, early antimicrobials, and source control planning.
• Escalate early if hypotension, rising lactate, altered mental state, or poor response to initial treatment.

Typical SBA traps:

• treating a score rather than the patient
• delaying antibiotics for imaging
• giving protocol fluids without considering heart failure or renal disease

5. Procedural sedation and the agitated patient

• Know the difference between analgesia, anxiolysis, sedation, and rapid tranquillisation.
• Procedural sedation requires appropriate patient selection, consent where possible, fasting considerations, monitoring, airway preparedness, trained staff, and recovery standards.
• Agitated patient questions often test safety first: call for help, de-escalation, identify reversible causes, protect staff and patient, then consider medication.
• Hypoxia, hypoglycaemia, head injury, intoxication, sepsis, and delirium are common hidden causes of agitation.
• Ketamine, propofol, and midazolam may appear in procedural sedation stems; choose according to indication, environment, and governance.
• Rapid tranquillisation is not the same as procedural sedation.

Typical SBA traps:

• sedating before assessing reversible causes
• forgetting capnography and monitoring
• choosing a drug without considering airway risk or staff capability

6. Major trauma and catastrophic haemorrhage

• Use C-ABCDE in exsanguinating trauma.
• Control catastrophic external haemorrhage early.
• Think pelvic binder, tourniquet, haemostatic dressings, blood products, and major haemorrhage protocol where appropriate.
• Tranexamic acid is time-critical in major trauma with significant bleeding or risk of significant bleeding.
• Permissive hypotension may be appropriate in selected trauma before haemorrhage control, but not in traumatic brain injury.
• Early transfer to a major trauma centre may be the key answer.

Typical SBA traps:

• delaying haemorrhage control for imaging
• forgetting pelvic binder in suspected unstable pelvic fracture
• using crystalloid-heavy resuscitation in major haemorrhage

7. Acute coronary syndrome

• Immediate priorities: ECG, analgesia, risk assessment, and reperfusion pathway where indicated.
• STEMI questions usually test immediate reperfusion pathway and antiplatelet/anticoagulant principles.
• NSTEMI/unstable angina stems often hinge on troponin timing, dynamic ECG change, or risk stratification.
• Do not give oxygen routinely unless hypoxic.
• Know that a normal initial ECG does not exclude ACS.

Typical SBA traps:

• reassurance after one normal ECG
• routine oxygen in normoxic patients
• confusing definitive cardiology management with immediate ED priorities

8. Stroke and TIA

• Time of onset or last known well is often the key discriminator.
• Urgent brain imaging is central to acute stroke pathways.
• Large vessel occlusion pathways and thrombectomy eligibility are increasingly examined conceptually.
• Do not lower blood pressure reflexively in acute stroke unless there is a specific indication.
• TIA questions often test urgency of specialist assessment and secondary prevention.

Typical SBA traps:

• delaying stroke team activation for non-essential tests
• missing posterior circulation symptoms
• underestimating high-risk TIA

9. Status epilepticus and first seizure

• Know the sequence: benzodiazepine first line, then second-line antiseizure medication if ongoing.
• Refractory status requires senior escalation, airway planning, and critical care involvement.
• Always check glucose early.
• Consider causes: missed medication, alcohol withdrawal, CNS infection, metabolic disturbance, intracranial pathology, toxicology.
• First seizure questions often test who needs imaging, admission, or urgent follow-up.

Typical SBA traps:

• repeating benzodiazepines excessively without escalation
• forgetting hypoglycaemia
• ordering EEG as the immediate ED test

10. Asthma and COPD exacerbations

• Learn severity features exactly, especially life-threatening asthma markers.
• In acute asthma, early bronchodilators, steroids, oxygen to target saturations, and escalation for poor response are core.
• Silent chest, exhaustion, hypotension, cyanosis, poor respiratory effort, altered consciousness, and rising CO2 are major red flags.
• In COPD, controlled oxygen therapy and blood gas interpretation are heavily tested.
• NIV is a common exam topic in acute hypercapnic respiratory failure.

Typical SBA traps:

• under-recognising life-threatening asthma
• giving uncontrolled high-flow oxygen in COPD without thought
• discharging without inhaler technique, steroids, and safety-netting

11. DKA and HHS

• Know the diagnostic triad for DKA: hyperglycaemia, ketonaemia, and acidosis.
• Fluid replacement, fixed-rate insulin infusion, potassium management, and monitoring are core.
• Do not start insulin without checking potassium and understanding the protocol context.
• HHS differs: profound hyperosmolar dehydration, usually less ketosis, slower correction.
• Look for precipitating causes such as infection, MI, stroke, or missed insulin.

Typical SBA traps:

• confusing DKA and HHS pathways
• ignoring potassium
• correcting glucose too fast without considering osmolality

12. Paracetamol overdose and toxicology basics

• Timing matters. The treatment decision depends on whether the overdose was single acute, staggered, repeated supratherapeutic, or time unknown.
• Paracetamol level is interpreted against the treatment nomogram only in appropriate single acute ingestions with known timing.
• Staggered overdose and uncertain timing are classic high-risk exam stems.
• N-acetylcysteine is the key antidote.
• Do not forget modified-release preparations, co-ingestants, and delayed presentation.

Typical SBA traps:

• using the nomogram when timing is unknown
• waiting for a level in a clearly high-risk staggered overdose
• forgetting to check LFTs, INR, renal function, and acid-base status where indicated

13. Paediatric bronchiolitis, croup and wheeze

• Bronchiolitis is usually viral and supportive management is key.
• Know admission triggers: apnoea, poor feeding, dehydration, significant work of breathing, hypoxia, and high-risk comorbidity.
• Croup questions often test severity and when nebulised adrenaline plus dexamethasone is needed.
• Do not over-investigate uncomplicated bronchiolitis.
• Differentiate bronchiolitis from viral-induced wheeze and asthma by age and clinical pattern.

Typical SBA traps:

• giving unnecessary antibiotics
• ordering chest X-ray in straightforward bronchiolitis
• missing severe croup features such as stridor at rest and exhaustion

14. Paediatric safeguarding and non-accidental injury

• Safeguarding is often embedded rather than labelled.
• Red flags include inconsistent history, delay in presentation, injuries inconsistent with developmental stage, multiple injuries of different ages, and concerning parent-child interaction.
• Document carefully: who gave the history, exact words, body map, examination findings, and senior discussion.
• Escalate early to senior clinicians and safeguarding pathways.
• The child’s immediate safety comes first.

Typical SBA traps:

• accepting an implausible mechanism without challenge
• failing to escalate because the child appears clinically well
• poor documentation

15. Upper GI bleed and variceal haemorrhage

• Resuscitation first: ABCDE, IV access, bloods, crossmatch, haemodynamic assessment.
• Risk stratification matters, but unstable patients need resuscitation and urgent specialty involvement first.
• Variceal bleed stems may test terlipressin, antibiotics, and urgent endoscopy planning.
• Restrictive transfusion strategies are often relevant, but massive bleeding changes priorities.
• Consider airway protection in ongoing haematemesis with reduced consciousness.

Typical SBA traps:

• focusing on scoring systems before resuscitation
• forgetting antibiotics in suspected variceal bleed
• delaying escalation in shocked patients

16. Acute severe headache, SAH and meningitis

• Thunderclap headache is SAH until proven otherwise.
• CT timing and the role of LP are classic exam areas.
• Suspected bacterial meningitis requires urgent antibiotics and senior involvement; do not delay treatment for LP in the unstable patient.
• Red flags include sudden onset, meningism, reduced consciousness, focal neurology, papilloedema, immunosuppression, and pregnancy/postpartum state where relevant.

Typical SBA traps:

• performing LP before imaging when contraindications exist
• delaying antibiotics in suspected meningitis
• reassurance after a non-specific normal examination in thunderclap headache

17. VTE and pulmonary embolism

• Use pre-test probability properly.
• D-dimer is for selected low or intermediate risk patients, not everyone with pleuritic pain.
• CTPA is the usual definitive imaging test for PE in many adult pathways.
• Pregnancy changes the pathway and should trigger pregnancy-specific imaging logic.
• Haemodynamic instability suggests high-risk PE and changes urgency and escalation.

Typical SBA traps:

• ordering D-dimer in high-risk patients who need imaging
• using PERC in the wrong population
• forgetting pregnancy-specific considerations

18. Testicular torsion, ectopic pregnancy and time-critical surgical emergencies

• These are classic “do not delay for unnecessary imaging” topics.
• Testicular torsion is a surgical emergency; urgent urology involvement is key.
• Ectopic pregnancy should be considered in any pregnant patient with pain, bleeding, syncope, or shock.
• Do not be falsely reassured by stable observations early on.
• Other common surgical SBA emergencies include cauda equina syndrome, acute limb ischaemia, and compartment syndrome.

Typical SBA traps:

• waiting for ultrasound in obvious torsion
• missing ectopic in a patient with shoulder tip pain or collapse
• failing to recognise cauda equina red flags

19. Critical appraisal and evidence interpretation

• This is one of the most bankable FRCEM areas because the syllabus is finite.
• Know study design, bias, confounding, randomisation, blinding, intention-to-treat, and external validity.
• Be comfortable with sensitivity, specificity, likelihood ratios, confidence intervals, p values, absolute risk reduction, relative risk reduction, and number needed to treat.
• Read the question carefully: many errors come from answering what the paper shows rather than what the statistic means.

Typical SBA traps:

• confusing precision with significance
• misreading confidence intervals
• assuming association proves causation

20. Governance, human factors and patient safety

• This is especially important for FRCEM SBA and OSCE.
• Know duty of candour, incident reporting, significant event review, complaints handling, consent, capacity, documentation, and escalation.
• Human factors themes include fixation error, task overload, communication failure, hierarchy, and situational awareness.
• Questions often test the safest and most professional next step rather than a purely clinical action.

Typical SBA traps:

• choosing informal local resolution when formal escalation is required
• poor understanding of open disclosure after harm
• failing to document and escalate near misses or safeguarding concerns

Disposition, Referral and Follow-Up

Disposition is one of the commonest exam discriminators.

• Head injury: discharge only if criteria are met, supervision is available, and advice is clear.
• Febrile child: disposition depends on age, traffic light features, hydration, social factors, and review plan.
• Sepsis: early senior review and admission are common; ICU referral may be needed.
• ACS, stroke, major trauma, status epilepticus, DKA, significant overdose, and GI bleed usually require admission or specialty pathway activation.
• Safeguarding concerns may mandate admission or place-of-safety planning even if the medical issue is minor.

In SBA questions, “safe discharge with advice” is only correct when the stem explicitly supports it.

Special Groups

These groups repeatedly change management:

• Paediatrics: age-specific observations, imaging criteria, safeguarding, and fluid considerations.
• Pregnancy: altered imaging pathways, ectopic risk, PE pathways, and maternal physiology.
• Older adults: frailty, anticoagulation, atypical presentation, delirium, and lower physiological reserve.
• Immunosuppressed patients: lower threshold for serious infection, atypical signs, and early escalation.
• Patients on anticoagulants or antiplatelets: especially important in trauma, GI bleed, and intracranial pathology.
• Patients with learning disability, dementia, or mental illness: capacity, communication, safeguarding, and diagnostic overshadowing.

Common Pitfalls

• mixing adult and paediatric criteria
• choosing what is possible rather than what guidance supports best
• confusing immediate management with definitive management
• over-investigating when a decision rule says no imaging is needed
• forgetting escalation, transfer, or safeguarding
• missing timing thresholds such as CT within 1 hour, antidote timing, or reperfusion windows
• using outdated practice, especially in head injury, sedation, trauma imaging, and toxicology

FRCEM and MRCEM Exam Tips

• MRCEM SBA focuses more on core recognition, first-line management, and common guideline thresholds.
• FRCEM SBA more often tests nuance: escalation, governance, disposition, integrated stems, and competing plausible options.
• FRCEM OSCE rewards structure, prioritisation, communication, and safe escalation.
• When stuck, identify the single discriminator in the stem:
  • age
  • timing
  • physiology
  • contraindication
  • failure of first-line treatment
  • need for senior referral or transfer
• Revise thresholds in tables, not prose.
• Practise saying the management sequence out loud for OSCEs.

How This Appears in SBA Questions

Typical stem patterns include:

• “Which patient requires CT head within 1 hour?”
• “What is the most appropriate next step in an alert trauma patient with neck pain?”
• “A 2-month-old with fever and poor feeding presents to the ED. What is the safest disposition?”
• “An agitated patient is threatening staff. What should happen first?”
• “A shocked trauma patient with pelvic instability arrives. What is the next best step?”
• “A patient has ongoing convulsive activity after first-line treatment. What should be given next?”
• “A staggered paracetamol overdose presents 18 hours later. What is the most appropriate management?”
• “Which feature makes this child with bronchiolitis unsuitable for discharge?”
• “What is the most appropriate action after identifying a likely non-accidental injury?”
• “Which statistic best describes the probability that a positive test reflects true disease?”

Key discriminator clues:

• under 3 months
• on anticoagulants
• cannot rotate neck 45 degrees
• last known well
• staggered overdose
• stridor at rest
• persistent hypotension after fluids
• ongoing seizure after benzodiazepine
• pregnant with pain and bleeding
• inconsistent injury history

Common wrong-answer traps:

• ordering the right test at the wrong time
• choosing a definitive treatment before stabilisation
• using an adult rule in a child
• using a low-risk pathway in a high-risk patient
• failing to escalate to senior or specialty care

Key Takeaways

• Head injury, paediatrics, sedation, trauma, toxicology, critical appraisal, and governance are consistently high yield.
• Learn exact thresholds, timings, and escalation points from UK guidance.
• Separate adult and paediatric pathways.
• In SBA questions, one discriminator usually determines the answer.
• Disposition is as examinable as diagnosis and treatment.
• Critical appraisal and governance are reliable scoring areas if revised systematically.
• For OSCEs, show structure, safety, communication, and escalation.

Further Reading

• NICE Head injury: assessment and early management
• NICE Spinal injury: assessment and initial management
• NICE Fever in under 5s: assessment and initial management
• NICE Sepsis: recognition, diagnosis and early management
• Resuscitation Council UK guidelines
• RCEM guidance on procedural sedation and acute behavioural disturbance
• BTS/SIGN British guideline on the management of asthma
• JBDS guidance for diabetic ketoacidosis and hyperosmolar hyperglycaemic state
• TOXBASE for poisoning management
• NICE Chest pain of recent onset
• NICE Stroke and transient ischaemic attack guidance
• NICE Bronchiolitis in children
• NICE Suspected neurological conditions
• RCEM curriculum and FRCEM examination blueprint

Related on EM Final Exams

• Most Common ECGs in FRCEM Exams
• Top 15 Paediatric Emergencies for MRCEM
• Top Trauma Topics You Must Know for FRCEM
• Top Toxicology Presentations in SBA Exams

Authoritative Sources

• NICE guidance
• Royal College of Emergency Medicine (RCEM)

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