Abstract
BackgroundDense exudate during the calcification of cerebral cysticercosis in basal subarachnoid space was easy to be misdiagnosed as subarachnoid hemorrhage (SAH); clinical evaluation and MRI can help differentiate SAH from pseudo-SAH.Case presentationA case of ventricular expansion accompanied by high-density shadows in cisterna circinata cerebri was taken to the hospital for treatment due to sudden faint. This patient was diagnosed as subarachnoid hemorrhage according to computed tomography (CT) in another hospital. We believe that the high density in cisterna circinata cerebri was misdiagnosed as subarachnoid hemorrhage (SAH) 1 year ago. The main etiology of SAH is aneurysm; non-aneurysmal SAH associated with cerebral cysticercosis is extremely rare. Only 5 patients have been reported.ConclusionThis case indicated that although the specificity of CT for SAH is very high, the physicians should be aware of rare false positive findings, called pseudo-SAH.
Highlights
Dense exudate during the calcification of cerebral cysticercosis in basal subarachnoid space was easy to be misdiagnosed as subarachnoid hemorrhage (SAH); clinical evaluation and Magnetic resonance imaging (MRI) can help differentiate SAH from pseudo-SAH.Case presentation: A case of ventricular expansion accompanied by high-density shadows in cisterna circinata cerebri was taken to the hospital for treatment due to sudden faint
We present the case of a man with subarachnoid form of cerebral cysticercosis and his dense exudate of cerebral cysticercosis in basal subarachnoid space was misdiagnosed as subarachnoid hemorrhage
The patient had a history of cysticercosis 30 years ago, and the computed tomography (CT) value of the high-density shadow near the thalamus and cisternae measured 92 Hu without perihematomal edema, so we considered the high-density shadow as calcification
Summary
This case indicated that the specificity of CT for SAH is very high, the physicians should be aware of rare false positive findings, called pseudo-SAH.
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