Iran Specialty Board Neurology common mistakes
Iran Specialty Board Neurology · Understand the traps and how to avoid them.
In acute ischemic stroke with a witnessed onset, committing to intravenous thrombolysis or transfer without first calculating the door-to-needle interval and checking the last-known-well time against the 4.5-hour window, then discovering the window has closed after imaging is done.
Candidates rehearse the thrombolysis checklist as a list of contraindications and forget that eligibility is time-anchored; the clock is treated as documentation rather than a decision variable, and 'wake-up stroke' or unclear-onset cases get lumped with clear-onset cases.
What to do instead
Before any other step, write the last-known-well time, the current time, and the remaining minutes on the top of the note. If onset is unclear or beyond 4.5 hours, explicitly switch to the extended-window pathway (perfusion or MRI-based selection where available) and state that decision out loud. Practise 10 timed vignettes where the only task is deciding window status.
Ordering or interpreting a non-contrast head CT in acute stroke and reporting 'no hemorrhage' without commenting on early ischemic change, hyperdense vessel sign, or the extent of established infarction that would change reperfusion decisions.
The CT is mentally filed as a hemorrhage rule-out only, because that is its most memorized role in thrombolysis; candidates do not build the habit of a structured early-ischemia read, and subtle signs are dismissed as artifact.
What to do instead
Use a fixed reading script for every stroke CT: hemorrhage, hyperdense artery, insular ribbon, lentiform nucleus, cortical sulcal effacement, and a rough extent estimate. Apply a validated early-change score in practice so the signs become routine rather than optional.
Treating a first unprovoked seizure or a single spell as automatically requiring long-term antiseizure medication, without first classifying the event (provoked vs unprovoked, focal vs generalized, seizure vs syncope vs psychogenic nonepileptic spell) and without weighing recurrence risk.
Exam vignettes reward decisiveness, so candidates jump to the treatment answer; the classification step feels like preamble, and the distinction between an acute symptomatic seizure and epilepsy is under-rehearsed.
What to do instead
Force a two-line formulation before any prescription: event classification and recurrence-risk estimate. Then state whether the answer is treat, defer, or investigate further. Rehearse the recurrence-risk figures for first unprovoked seizures and the definition of epilepsy as a disease.
Reading an EEG report by pattern-matching single waveforms (spike equals epilepsy, slowing equals encephalopathy) instead of describing background organization, symmetry, reactivity, and the field and evolution of discharges.
EEG is studied as a catalogue of named patterns rather than as a spatial-temporal signal; candidates never practise describing a full epoch in sequence, so they anchor on the most eye-catching transient.
What to do instead
Practise a mandatory four-step read on every tracing: background and symmetry, reactivity and state, focal abnormalities with field, then discharges with morphology and evolution. Describe before diagnosing; say what the pattern is compatible with and what it is not.
Diagnosing a length-dependent sensory neuropathy from symptoms alone and stopping there, without confirming with examination findings, without a targeted etiologic workup, and without distinguishing axonal from demyelinating physiology when the tempo or examination suggests an acquired demyelinating process.
The 'stocking-glove equals diabetic neuropathy' shortcut is overlearned; candidates treat the label as the endpoint and do not ask whether the tempo, asymmetry, or motor involvement demands nerve conduction studies and a different differential.
What to do instead
State the phenotype first (symmetric vs asymmetric, sensory vs motor, proximal vs distal, acute vs chronic), then list the physiology you expect on nerve conduction studies, then the workup that phenotype justifies. If the phenotype does not fit a length-dependent process, explicitly justify why electrodiagnostic testing is needed.
Interpreting nerve conduction and needle EMG findings without confirming technical adequacy: not checking limb temperature, not verifying supramaximal stimulation, and accepting a 'demyelinating' conclusion from a single segment without confirming conduction block or temporal dispersion across segments.
Electrodiagnosis is memorized as pattern recognition rather than as a measurement discipline; artifacts, co-stimulation, and volume conduction produce findings that mimic pathology, and candidates lack a habit of asking whether the number is real.
What to do instead
Before interpreting, verify temperature, supramaximal stimulation, electrode placement, and whether the abnormality is reproduced in a second segment. For any demyelinating call, require at least two supportive criteria and exclude technical causes. Practise identifying artifact-contaminated waveforms.
Labeling a first demyelinating event as multiple sclerosis immediately, without applying dissemination in time and space criteria, without excluding mimics, and without checking whether the syndrome is better explained by NMOSD or MOGAD (for example optic neuritis with severe visual loss, bilateral involvement, or longitudinally extensive myelitis).
The word 'demyelinating' triggers the MS template; candidates do not run the antibody-associated pathway because those disorders were added later to their mental model, and they treat a single MRI as sufficient.
What to do instead
For every demyelinating presentation, write out dissemination in space and time explicitly, list the top three mimics with the test that excludes each, and add a mandatory question: does this fit an antibody-associated syndrome? Know the red flags (longitudinally extensive cord lesion, bilateral or severe optic neuritis, area postrema syndrome) and the corresponding antibody test.
Diagnosing Parkinson disease from tremor alone, without checking for rest tremor, asymmetry, bradykinesia, rigidity, and dopaminergic responsiveness, and without screening for red flags that point to an atypical parkinsonian syndrome or a drug-induced cause.
Tremor is the most salient and most publicized feature, so it dominates pattern recognition; candidates under-weight bradykinesia as the required cardinal feature and skip the medication and red-flag history.
What to do instead
Apply the cardinal-feature checklist explicitly and require bradykinesia plus at least one other feature with asymmetry. Then run a red-flag screen (early falls, vertical gaze palsy, prominent autonomic failure, cerebellar signs, neuroleptic exposure). State the syndrome before naming a disease.
Classifying a headache by the patient's description of severity alone, without building the phenotype from frequency, duration, location, quality, associated features, and trigger pattern, and without applying the red-flag screen for secondary headache.
Headache is treated as a low-stakes topic, so candidates answer from a memorized 'migraine equals throbbing plus photophobia' reflex and skip the structured history that separates primary syndromes and detects dangerous secondary causes.
What to do instead
Use a fixed phenotype grid for every headache question: frequency, duration, location, quality, severity, associated features, and triggers. Then run the red-flag checklist (thunderclap onset, fever, focal deficit, papilledema, age over 50 with new headache, positional or Valsalva-related change, cancer or immunosuppression). Diagnose only after both steps.
Managing raised intracranial pressure or a deteriorating neurocritical care patient by treating the monitor (for example, chasing a number) rather than the examination, and without a structured airway, ventilation, sedation, and herniation-prevention sequence.
Critical care neurology is learned as isolated facts (osmotic therapy, steroids, ventilation targets) without a sequenced approach, so candidates pick a plausible intervention instead of establishing the ordered priorities that determine outcome.
What to do instead
Rehearse a fixed sequence for any declining neuro patient: airway and ventilation, hemodynamics and cerebral perfusion, sedation and seizure control, then targeted therapy for the suspected mechanism. Justify each step by the physiology it protects, and practise stating what you would do first, second, and third.