计算机断层扫描显示假性蛛网膜下腔出血征象的双侧慢性硬膜下血肿
Bilateral Chronic Subdural Hematoma Presenting with Pseudo-Subarachnoid Hemorrhage Sign on Computed Tomography.
作者信息
Shima Hiroshi, Shirokane Kazutaka, Baba Eiichi, Tsuchiya Atsushi, Nomura Motohiro
机构信息
Department of Neurosurgery, Shima Neurosurgical and Orthopedic Clinic, Kanto Rosai Hospital, Kawasaki, Japan.
Department of Neurosurgery, Kanto Rosai Hospital, Kawasaki, Japan.
出版信息
Asian J Neurosurg. 2019 Apr-Jun;14(2):510-512. doi: 10.4103/ajns.AJNS_11_19.
BACKGROUND
On rare occasions, cisterns are demonstrated as high-density areas on computed tomography (CT) and misdiagnosed with subarachnoid hemorrhage (SAH). This false-positive finding is called pseudo-SAH.
PATIENTS AND METHODS
From April 2014 to August 2018, a total of 161 patients with chronic subdural hematoma (CSDH) were treated in our hospital. For these cases, the existence of a pseudo-SAH sign on CT was retrospectively examined.
RESULTS
One patient with bilateral CSDH showed pseudo-SAH and a further examination to evaluate vascular abnormalities causing true SAH was necessary. In three patients, the Sylvian fissures were demonstrated as high-density areas due to an atherosclerotic middle cerebral artery; however, the condition was not misdiagnosed with SAH.
CONCLUSION
In cases of CSDH, there is a possibility that CT demonstrates a pseudo-SAH sign. In such cases, close examinations to exclude true SAH are mandatory.
背景
在极少数情况下，脑池在计算机断层扫描（CT）上表现为高密度区，并被误诊为蛛网膜下腔出血（SAH）。这种假阳性结果被称为假性SAH。
患者与方法
2014年4月至2018年8月，我院共治疗161例慢性硬膜下血肿（CSDH）患者。对这些病例进行回顾性研究，观察CT上假性SAH征象的存在情况。
结果
1例双侧CSDH患者出现假性SAH，需要进一步检查以评估导致真性SAH的血管异常。3例患者因大脑中动脉粥样硬化，脑外侧裂表现为高密度区；然而，该情况未被误诊为SAH。
结论
在CSDH病例中，CT有可能显示假性SAH征象。在这种情况下，必须进行仔细检查以排除真性SAH。
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