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CASE REPORT
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Ruptured mycotic cerebral aneurysm secondary to disseminated nocardiosis


 Department of Neurosurgery, University of Tsukuba Hospitals, Tsukuba, Japan

Correspondence Address:
Aiki Marushima,
Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305.8575
Japan
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ajns.AJNS_283_20

We report a case of a ruptured mycotic cerebral aneurysm caused by Nocardia infection. A 22-year-old immunocompromised woman with adult-onset Still's disease developed a subarachnoid hemorrhage (SAH). Digital subtraction angiography revealed a small aneurysm at the M2-3 bifurcation of the right middle cerebral artery. Cardiac ultrasonography showed vegetation at the posterior cardiac wall, suspecting infective endocarditis (IE). Gram-positive filamentous bacteria were observed in the necrotic tissue surrounding the aneurysm obtained during trapping surgery. Long-term blood culture showed that the cause of her cerebral mycotic aneurysm was nocardiosis. A mycotic ruptured cerebral aneurysm is an important cause of SAH in immunocompromised patients. Early diagnosis of IE, detection of gram-positive rods by Gram staining, and long-term culture to identify the bacteria is crucial in diagnosing nocardiosis.


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    -  Goto M
    -  Marushima A
    -  Tsuda K
    -  Takigawa T
    -  Tsuruta W
    -  Ishikawa E
    -  Matsumaru Y
    -  Matsumura A
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