包括：①亚急性硬化性全脑炎（subacutesclerosingpanencephalitis，SSPE）；②进行性风疹全脑炎（progressiverubellapanencephalitis）；③进行性多灶性白质脑炎（progressivemultifocalleukoencephalitis）；④直接逆转录病毒脑病（directretrovirusencephalopathy）。
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