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A 49-year-old man developed transient (48 hours) cortical blindness following diagnostic cerebral angiography (normal) that had been performed to investigate a cerebellar haemorrhage from 6 months before. His blood pressure was normal during the diagnostic angiography. Gadolinium-enhanced MR scan of brain 2 hours after angiography showed restricted diffusion in the occipital cortex, predominantly left sided, with normal fluid attenuation inversion recovery (FLAIR) sequences (figure 1). Seven hours later, diffusion-weighted imaging was unchanged but FLAIR showed bilateral subarachnoid occipital hyperintensities which were not visible on other sequences, including T2*-weighted imaging (figure 1). Six days later, repeat imaging was completely normal (figure 1).
Contributors All authors contributed equally and agreed with the full content of the manuscript.
Funding This research received no specific grant from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient consent Obtained.
Ethics approval CHU Nîmes.
Provenance and peer review Not commissioned; externally peer reviewed. This paper was reviewed by Joshua Klein, Boston, USA.