Abstract
Although high-density lentiform appearance which is typical finding for acute epidural hematoma (AEDH) is unusual, several studies previously reported such atypical appearance of acute subdural hematoma (ASDH) on computed tomography (CT) scan. A 78-year-old woman visited our hospital with right-side grade IV weakness and headache that developed 1 day before, without any trauma history. Brain CT scan revealed left-side high-density lentiform hematoma with peripheral crescent changes. On the opposite side, there was simultaneous typical ASDH. During surgery, there was no epidural hematoma and a large amount of dark red–colored hematoma was seen after opening of dura. A clinical history of patient and careful observation of preoperative CT scan allows clinician to differentiate ASDH from AEDH before operation.
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