Common diagnosis at an unusual age - pulmonary oedema in a toddler

Description 

A 15-month-old toddler presented to the emergency department (ED) with a history of fatigue, rhinitis and reduced oral intake. The medical history was remarkable for diarrhoea (Enterohaemorrhagic Escherichia coli (EHEC), Shiga toxin) positive haemolytic uremic syndrome (D⁺-HUS) 3 months ago with microangiopathic haemolytic anaemia, thrombocytopenia, renal failure and hypertension. When HUS was diagnosed, he had a blood pressure of 117/82 mm Hg, anuria over 18 hours and a platelet count of 110x10⁹/L with fragmentocytes on blood film without evidence of complement dysfunction. The patient had come off dialysis after 1 month with persistent impaired renal function (peak creatinine 300 µmol/L, on discharge 205 µmol/L, estimated glomerular filtration rate (eGFR) 10 and 15 mL/min/1.73 m², respectively). He was on regular amlodipine, calcitriol and sodium bicarbonate. Parents reported normal urine output. Clinical examination showed respiratory rate 62/min, no recessions, heart rate 154/min, blood pressure 122/98 mm Hg, pulse oximetry 100% and normal temperature. Lung auscultation revealed bilateral inferior...

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