An asymptomatic 72-year-old man presented with bilateral papilloedema. Cranial CT imaging was normal, but lumbar puncture found an opening pressure of 320 mmH2O (120–250) with raised cerebrospinal fluid protein, increased red blood cells and xanthochromia. MR scan of spine showed a cauda equina tumour, histologically defined as a paraganglioma. The papilloedema resolved after surgery.
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