與蜘蛛網膜囊腫相關的慢性硬腦膜下出血：病例報告

Arachnoid Cyst-associated Chronic Subdural Hematoma: A Case Report

慢性硬腦膜下出血是老人或是腦萎縮病人在頭部外傷數星期後常見的病症。蜘蛛網膜囊腫是一種內容物為腦脊髓液的先天性病灶，大多數病人沒有症狀，通常是因為頭部外傷後進行腦部影像檢查時意外發現。少數蜘蛛網膜囊腫病人會在外傷後併發慢性硬腦膜下出血，如本文提出的病例。

Chronic subdural hematomas (cSDH), a common condition tends to develop several weeks after head trauma in patients with atrophic brains, such as the elderly. Arachnoid cysts (AC) are congenital intracranial lesions filled with cerebrospinal fluid (CSF). They have a benign natural history in most patients, and are often found incidentally on intracranial images performed after head trauma. On rare occasions, ACs are complicated by cSDHs. Herein, we present a case involving a patient with AC-associated cSDH.