Correction
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Nagendran A, Patel B, Khan U. The zebra sign: an unknown known. *Pract Neurol* 2016;16:48–49. doi:10.1136/practneurol-2015-001180

In the abstract the last sentence should read: 'We discuss the possible mechanisms of remote cerebellar haemorrhage—cerebellar haemorrhage that develops after spinal or intracranial surgery—giving rise to the 'zebra sign' and the possible mechanism of convexity subarachnoid haemorrhage in this context.'

In the Key points section the second point should read: 'Remote cerebellar haemorrhage may give rise to a pattern of bleeding akin to zebra stripes and has been called the 'zebra sign''.