Syncope in pulmonary hypertension is a bad sign, not an incidental symptom. Open this for the bedside traps: a negative CT pulmonary angiogram does not exclude chronic thromboembolic disease, and rapid worsening after vasodilators should raise concern for pulmonary veno-occlusive disease.

The clue is the mismatch: coffee-ground emesis with little haemodynamic consequence, plus confusion, falls and hyponatraemia. Worth opening first for a clean lesson in reopening the differential, examining the mouth, and spotting subdural haematoma before one abnormal result ends the thinking.

Persistent vertigo with dysmetria, gaze-evoked nystagmus or truncal ataxia is a central neurological syndrome until proved otherwise. A normal MRI or negative tissue transglutaminase IgA does not exclude gluten ataxia, so rebuild the problem and take a dietary history.

Burnout is not a synonym for tiredness. The practical lesson is to distinguish circumstantial stress from existential burnout, ask where repeated value conflict is occurring, and screen for depression when symptoms persist instead of defaulting to resilience advice alone.

Begin AKI with bladder scan and urinalysis before broad testing. Severe renal failure with anaemia, thrombocytopenia, schistocytes, hypertension, and proteinuria should trigger urgent concern for thrombotic microangiopathy, while dialysis decisions still follow AEIOU indications rather than the creatinine alone.

A sepsis-like collapse with cytopenias, liver failure and diarrhoea becomes much more useful when ferritin, triglycerides and fibrinogen move up the list. Open this for a sharp reminder that HLH is not the end of the diagnosis, and that chronic thrombocytopenia with hepatosplenomegaly deserves a storage-disorder work-up.

A missed dialysis session and a high potassium result can look calmer than they are. Open this for the treatment sequence: monitor early, give calcium promptly, run shift-and-elimination measures in parallel, and do not let a normal ECG or well appearance slow dialysis planning.