A轴位B矢状位C弥散加权D表观扩散系数
图双侧丘脑旁高信号，T2加权显示右侧病灶比左侧更大（箭头A和B）。弥散加权成像显示高信号强度（箭头，C）和相应区域的表观扩散系数降低（方框，D）。
Awhitewomaninher30spresentedwithacute-onsetsleepinessanddecreaseinconsciousness.Shehadnohistoryofneurologicdiseaseanddidnotusetobacco,alcohol,orillicitdrugs.Shewasafebrile,withbloodpressureof/70mmHg,respiratoryrateof16breaths/min,heartrateof72beats/min,andnovomitingorneckstiffness.TheGlasgowComaScalescorewas14,withconfusedconversationbeingthebestverbalresponse.Nocranialnervepalsyorlateralizingneurologicdeficitswereseen.Thepupilswereisochoricandnormallyreactivetolight.Theexaminationofvigilanceandcognitionrevealedexcessivedrowsinesswithrecurrentconsciousnessfluctuationsandexecutivedysfunctionassociatedwithinitiativeloss.A
