A 56-year-old Japanese man with a medical history of diffuse large B-cell lymphoma presents to ED with fever lasting for 15 hours. He also has vomiting and haematochezia.

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A 56-year-old Japanese man with a medical history of diffuse large B-cell lymphoma presents to ED with fever lasting for 15 hours. He also has vomiting and haematochezia. He has no history of travel or outdoor activities.

His blood pressure is 119/90mmHg, heart rate is 98bpm, respiratory rate is 24 breaths/min and temperature is 34.6°C; oxygen saturation could not be measured.

Skin findings are shown. Heart, lung and abdominal findings are unremarkable.