大多数无症状，但是也可以出现癫痫发作或局灶性神经缺失。
Most are asymptomatic, but they may present with seizures or focal neurological deficits.
P 53和WT1在大多数病例中为阴性表达，少数病例中可见一些叫弱的或局灶性阳性表达。
P53 and WT1 are negative in most cases or weakly focally positive in few cases.
光镜下发现各级冠状动脉壁水肿，外膜及中膜局灶性坏死，外膜及其周围组织淋巴郁滞，后期出现结缔组织增生或纤维化；
Light microscopy showed edema in the arterial wall with local necrosis in the media and adventitia, and dilated lymph vessles and later fibrosis in the adventitia and perivascular tissues.
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