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A 61-year-old man presented with fatigue, arthralgias and a tender rash on his ears in the setting of recent cocaine use. Physical examination revealed purpuric dark purple patches with haemorrhagic bullae on the bilateral helical rims (figures 1 and 2). Laboratory investigation was significant for a serum sodium of 130 mmol/l (normal range, 135–145) and positive perinuclear antineutrophil cytoplasmic …
Contributors KCL and BL contributed equally to the conception, design, drafting and revision of the article and approved the final version of the article to be published. BL will be responsible for the overall content as guarantor.
Competing interests None.
Patient consent Obtained.
Provenance and peer review Not commissioned; internally peer reviewed.
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