Ｃｈｒｏｎｉｃ　ｉｎｔｒａｃｅｒｅｂｒａｌ　ｈｅｍａｔｏｍａの臨床像を呈したａｎｇｉｏｇｒａｐｈｉｃａｌｌｙ　ｏｃｃｕｌｔ　ｍｉｃｒｏ　ＡＶＭの１例

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We report a case of angiographically occult micro arteriovenous malformations (AVMs) presenting a clinical picture as chronic intracerebral hematoma in the case of a 31-year-old woman. She suffered from gradually worsening headache and nausea for a week. Brain magnetic resonance imaging (MRI) performed at the out-patient department (O.P.D.) revealed the presence of a cystic mass lesion (diameter, 6 cm) with niveau at the left caudate head. After the patient was admitted to our hospital, the cystic mass gradually increased in size and her conscious level and right hemiparesis deteriorated. MRI with gadolinium enhancement showed no abnormal enhancement of the lesion, and repeated digital subtraction angiography did not reveal any abnormal vascular structure. After the third surgical intervention, she was discharged from our hospital without any major neurological deficit. Intraoperative findings revealed the cystic mass had a blackish-brown liquid collection similar to cases of chronic subdural hematoma. Histological examination indicated the presence of micro AVM.
一般社団法人日本脳卒中の外科学会の論文