PMC7149420_01
The CT image in July 28th. No blood could be seen.
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A head CT scan (Figure 1) and electroencephalogram were done firstly because there is a hematoma on the scale, making us hypothesizing the patient had a head trauma.
The MRI image in July 31st. A small amount of bleeding was displayed in the occipital lobe.
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Then, a head magnetic resonance imaging (MRI) was done on 31st July, and the Flair phase showed a high density in the partial sulci of the occipital lobe (Figure 2).
The CT examination in August 2nd. No blood could be seen.
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August (Figure 3), and still no blood was seen. And a lumbar puncture was made quickly and three tubes of homogeneous and bloody cerebrospinal fluid were got, which helped us make a definite diagnosis of subarachnoid hemorrhage.