患者,男性,16岁,无明显诱因出现右面部、右上肢麻木20余天入院。查体:神志清楚。右侧颜面部触觉减退,痛觉过敏。右侧上下肢痛觉过敏,触觉减弱。深感觉双侧对称。四肢肌力均为5级。各深肌腱反射对称,双侧病理征阳性。CT示:左侧丘脑区类圆形结节影,混杂密度,周围水肿明显(图1)。MRI示:左侧丘脑区占位,大小30cm×3.2cm×3.0cm,等T1 Patients, male, 16 years old, no obvious incentive to appear on the right side of the face, numbness right upper limb more than 20 days admission. Physical examination: conscious. Hypochromic facial sensation on the right, hyperalgesia. Right lower extremity hyperalgesia, tactile decline. Deep feeling bilateral symmetry. Limb muscle strength are 5. The deep tendon reflex symmetry, positive bilateral pathology. CT showed: round nodules on the left side of the thalamus, mixed density, obvious edema (Figure 1). MRI showed: left thalamic area, size 30cm × 3.2cm × 3.0cm, and so on T1