Arab Board IM Final Written common mistakes
Arab Board IM Final Written · Understand the traps and how to avoid them.
Committing to a single diagnosis in a stem that describes two coexisting problems (e.g., a breathless patient with both a raised D-dimer and a consolidation), then answering every subsequent option as if only one disease exists.
Candidates pattern-match the first striking clue and stop reading; exam stems deliberately bundle a chronic disease with an acute decompensation, and the 'best next step' depends on treating the acute problem without destabilising the chronic one.
What to do instead
Before answering, write a one-line problem list (every abnormal finding grouped into syndromes). If two syndromes are present, the correct option usually addresses the more immediately life-threatening one or the one that unifies both; reject options that would harm the other syndrome.
Choosing the most sensitive test as the 'best initial test' and the most specific test as the 'best confirmatory test' without checking whether the stem asks for initial, confirmatory, or most appropriate next step.
The same disease appears in many items with different question stems; candidates answer the question they remember rather than the one asked, and conflate 'rule out' with 'rule in'.
What to do instead
Underline the exact interrogative phrase. Map it: 'most likely diagnosis' = epidemiology plus pathognomonic feature; 'best initial test' = fastest, least invasive test that changes management; 'definitive/confirmatory' = gold standard; 'next step' = what you do before or instead of the test.
Applying a remembered numerical threshold (e.g., a sodium correction rate, a transfusion trigger, a steroid dose) as a fixed rule when the stem contains a modifying factor such as active bleeding, cardiac failure, or renal impairment.
Thresholds are memorised as isolated numbers without the clinical context that generated them; examiners add a modifier precisely to test whether the candidate understands the rationale.
What to do instead
For every number you recall, rehearse the 'because' clause: what harm does the threshold prevent? Then check the stem for that harm. If the harm is already present or the risk is reversed, the threshold shifts, and the option that acknowledges the modifier is correct.
Ignoring the acid-base and electrolyte data embedded in an arterial blood gas, answering only the oxygenation and pH, and missing a mixed or triple disorder.
Candidates calculate one anion gap and stop; they do not systematically check compensation, delta ratio, or the osmolar gap, so mixed disorders and added metabolic processes are missed.
What to do instead
Use a fixed sequence every time: pH, then PaCO2, then HCO3, then expected compensation, then anion gap with albumin correction, then delta-delta, then osmolar gap. Answer only after completing all steps in order.
Treating a 'which is the single best answer' item as a true/false exercise, eliminating options on one trivial inaccuracy while ignoring that the surviving option is clinically dangerous or non-specific.
Candidates are trained to spot errors rather than to rank options; in best-answer format all distractors are partly true, so error-spotting selects a plausible but wrong option.
What to do instead
Rank, don't eliminate. For each surviving option ask: does it change outcome, is it first-line, and does it fit this patient's contraindications? The correct option is the one that is both true and the highest-yield action for this specific patient.
Missing the diagnosis when the presentation is atypical for the patient's demographic (e.g., dismissing acute coronary syndrome in a young woman or in a diabetic, or dismissing tuberculosis in an immunocompetent adult), because the classic risk profile is absent.
Illness scripts are anchored to the textbook demographic; atypical presentations are exactly what high-level items test, and anchoring causes premature closure.
What to do instead
When a stem gives a 'can't-miss' red flag (crushing pain, night sweats, weight loss, new focal neurology), the diagnosis must be excluded regardless of age or sex. Ask 'what would kill this patient if I missed it?' and confirm that has been addressed before choosing.
Answering management questions with the definitive therapy when the stem describes an unstable patient, skipping the resuscitation or stabilisation step that must come first.
Candidates recall the disease-specific treatment and forget that in emergency items the correct answer is almost always airway, breathing, circulation, or immediate source control before definitive therapy.
What to do instead
In any stem with haemodynamic instability, hypoxia, or reduced consciousness, the first decision is always stabilisation. Scan options for the resuscitative step and choose it unless the stem explicitly says the patient is stable.
Confusing drug-induced syndromes with the disease they mimic (drug-induced lupus, drug-induced hyperkalaemia, drug-induced parkinsonism, drug-induced hepatitis), and failing to make 'stop the drug' the answer.
Candidates focus on treating the syndrome and overlook the temporal relationship and the drug list in the stem; pharmacology is studied separately from the organ system, so the link is not made at the point of decision.
What to do instead
For every rheumatological, neurological, hepatic, or electrolyte syndrome, scan the medication list first and ask 'could this drug cause this, and does the timing fit?' If yes, withdrawal is the answer and rechallenge is contraindicated.
Misreading the prognostic or risk-stratification question as a treatment question (or vice versa), for example offering thrombolysis when asked for the strongest predictor of mortality, or offering a severity score when asked for management.
The stem's clinical scenario pulls attention to the acute management, and the interrogative tail is read too quickly; scoring systems and prognostic markers are also less well rehearsed than treatments.
What to do instead
Read the final sentence before reading the options and classify it as diagnosis, investigation, management, prognosis, or complication. Answer only in that category; if you cannot name the category, re-read the stem.
Failing to use the negative findings in the stem as discriminators, so an option is chosen that the stem has already excluded (e.g., choosing a diagnosis requiring fever when the stem states the patient is afebrile, or choosing a therapy contraindicated by a stated creatinine).
Candidates read the stem for positives and skim over stated normals and negatives; examiners embed the discriminator in a single phrase such as 'no rash' or 'normal anion gap'.
What to do instead
On the second pass, list every explicitly stated normal or negative finding and strike out any option inconsistent with it. The remaining option is usually correct, and this pass also catches the trap of a 'classic' diagnosis the stem has ruled out.