59 yow, explosive headache during sex two weeks before. Norm | Figure 1
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59 yow, explosive headache during sex two weeks before. Normal Head CT one week after onset. Presents to ER because of ongoing neck pain. Neuro exam notable for neck stiffness and + Brudzinski's-sign. This is CSF obtained from LP. What can we see in the image? What is diagnosis? What is the probable cause?
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