Today’s collection is linked by a need to recognise risk before it becomes obvious and to interpret tests in the context of the decision they are meant to inform. That applies to pregnancy planning in cardiovascular disease, persistent fever in a child, endotoxin-directed treatment in septic shock, unusual movement disorders, rare metabolic disease and consultations shaped by online health claims.

The cardiovascular material begins before conception. Pregnancy increases blood volume, heart rate and cardiac output while reducing systemic vascular resistance; delivery and the early postpartum period add further stress through autotransfusion, fluid shifts and rising vascular resistance. Exertional dyspnoea or palpitations therefore deserve targeted assessment when progressive, function-limiting or accompanied by a concerning family history. Previous hypertensive disorders, gestational diabetes, fetal growth restriction or preterm delivery also carry information about future cardiovascular risk.

Modified WHO and CARPREG-2 scores can support discussion, but they do not replace lesion-specific physiology, functional status, previous pregnancy experience, access to care and patient goals. Testing may include an electrocardiogram, echocardiography, rhythm monitoring, exercise testing or cross-sectional imaging, selected according to the clinical question. Medication review should happen before a positive pregnancy test because several cardiovascular drugs require planned change. Severe symptomatic mitral stenosis or pulmonary arterial hypertension may make pregnancy unsafe until specialist assessment or intervention has taken place. Contraception is then part of active treatment planning, with early multidisciplinary input.

The paediatric cardiovascular theme is Kawasaki disease. Fever lasting more than five days becomes particularly concerning when accompanied by rash, bilateral non-purulent conjunctivitis, cracked lips or strawberry tongue, cervical lymphadenopathy, and red swollen hands or feet. Palm and sole desquamation may appear later. A structured examination of the eyes, mouth, neck, skin and limbs helps prevent the syndrome being treated as an undifferentiated infection or dermatological illness.

Blood tests and urinalysis can support the clinical picture, but coronary artery involvement drives urgency. Echocardiography identifies and monitors coronary pathology, including aneurysm formation, and should be repeated during follow-up. Treatment centres on intravenous immunoglobulin and high-dose aspirin to reduce inflammation, thrombosis and coronary risk.

The critical-care evidence update asks whether extracorporeal endotoxin removal improves outcomes in septic shock. Polymyxin B haemoperfusion passes blood through a cartridge that adsorbs circulating endotoxin. Although a dialysis machine may support the circuit, the intervention is not renal replacement therapy and should not be expected to correct creatinine or potassium.

EUPHRATES uses a blinded sham-controlled design and is neutral for 28-day mortality in its main analysis. TIGRIS studies a narrower population with early vasopressor-dependent shock, significant organ dysfunction and endotoxin activity between 0.60 and 0.89. Its positive primary inference depends on Bayesian borrowing from a favourable post-hoc EUPHRATES subgroup; the stronger 90-day signal is secondary. Biological plausibility, a selected subgroup and a later signal do not automatically justify broad implementation. A service would also need rapid endotoxin testing, cartridge access, trained staff and a workflow capable of identifying eligible patients early.

The neurological material turns to a bedside sign that is easily mislabelled. Negative myoclonus is a sudden interruption of tonic muscle contraction. Asterixis looks like flapping because the hands briefly drop during sustained extension and then return, rather than because a rhythmic tremor has appeared. Patients may report dropping objects, difficulty writing, head nodding, gait instability or falls, so examination should include sustained posture.

Epileptic negative myoclonus arises from the cortex and is time locked to an electroencephalographic spike. Non-epileptic forms may reflect subcortical, metabolic, medicine-related or structural causes, including hypomagnesaemia, hypercapnia, renal or liver failure, and several neurological or sedating medicines. Acute or focal presentations also require consideration of encephalitis or brain haemorrhage. Management begins with identifying and correcting the underlying disorder; valproic acid may be used when an epileptic form is established.

The rare-disease review connects cholesterol and bile acid synthesis. Smith-Lemli-Opitz syndrome ranges from severe fetal or neonatal disease to subtle learning or behavioural differences, with growth failure, malformations and second-to-third toe syndactyly among the clues. Cerebrotendinous xanthomatosis may present with neonatal cholestasis, chronic diarrhoea, juvenile cataracts, developmental delay, progressive ataxia, cognitive decline and tendon xanthomas. Full sterol or bile acid profiles can distinguish overlapping disorders and help interpret genetic variants. Medicines and recent propofol exposure must be documented because they can distort results. Early chenodeoxycholic acid treatment can suppress abnormal metabolites and reduce progression in cerebrotendinous xanthomatosis; newborn screening is promising because diagnostic delay remains common.

The final theme concerns how patients encounter health information. Algorithms reward engagement and repetition, while personal stories and medical language can make commercially driven claims appear trustworthy. Direct-to-consumer fertility tests, whole-body imaging and single wearable metrics may produce anxiety, false positives, incidental findings or behaviour based on a number that does not answer the real clinical question. Begin by asking what the patient saw and why it resonated. Validate the concern without automatically endorsing the proposed diagnosis, test or product, then discuss benefits, harms, alternatives and the option of doing nothing. Transparent uncertainty is more useful than dismissal or false reassurance.