Abstract
A rare case of childhood subarachnoid hemorrhage (SAH) is reported. A 5-year-old boy presented with SAH. A cerebral angiogram showed obstruction of the first segment of the left anterior cerebral artery (A1). The A1 was surgically trapped to prevent rebleeding. Proliferation of myofibroblasts was revealed in the intima of the A1. Cerebral infarction appeared in the territory of the left middle cerebral artery (MCA) on day 2 after onset of SAH, and the patient suffered a second SAH on day 26. The second angiogram showed stenosis and a saccular aneurysm in the left MCA. A second surgery, neck clipping of the aneurysm, was needed. The multiple arterial lesions and histological findings indicated that the SAHs and the infarction were caused by the dissecting aneurysm affected with fibromuscular dysplasia (FMD). Intracranial FMD is mainly detected in children and causes cerebral ischemia and bleeding. Surgical treatment of childhood SAH should be discretely chosen with due consideration for FMD.
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