Special type of Wernekink syndrome in midbrain infarction: Four case reports

Figure 1 Patient 1. A: Brain magnetic resonance imaging (MRI) on March 12, T1 weighted image, T1 low signal can be seen at the midbrain aqueduct; B: Brain MRI on March 12, T2 weighted image, T2 high signal can be seen at the midbrain aqueduct; C: Brain MRI on March 12, diffusion-weighted imaging, high signal can be seen in the midbrain aqueduct; D-F: Head and neck computed tomography angiogram on March 24, mild atherosclerosis of the double carotid artery and left subclavian artery.

Figure 2 Patient 2. A: Brain magnetic resonance imaging (MRI) on February 6, T1 weighted image, T1 low signal can be seen at the midbrain aqueduct; B: Brain MRI on February 6, T2 weighted image, T2 high signal can be seen at the midbrain aqueduct; C: Brain MRI on February 6, diffusion-weighted imaging, high signal can be seen in the midbrain aqueduct; D-F: Cerebrovascular computed tomography angiogram on February 13, a little mixed plaque at the bifurcation of the right common carotid artery.

Figure 3 Patient 3. A: Brain magnetic resonance imaging (MRI) on June 25, T1 weighted image, T1 low signal can be seen at the midbrain aqueduct; B: Brain MRI on June 25, T2 weighted image, T2 high signal can be seen at the midbrain aqueduct; C: Brain MRI on June 25, diffusion-weighted imaging, high signal can be seen in the midbrain aqueduct; D and E: Head and neck computed tomography angiogram on June 28, multiple moderate stenosis of basilar artery, multiple mild to moderate localized stenosis of bilateral middle cerebral artery.

Figure 4 Patient 4. A: Brain magnetic resonance imaging (MRI) on May 5, T1 weighted image, T1 low signal can be seen at the midbrain aqueduct; B: Brain MRI on May 5, T2 weighted image, T2 high signal can be seen at the midbrain aqueduct; C: Brain MRI on May 5, diffusion-weighted imaging image, high signal can be seen in the midbrain aqueduct; D-F: Head and neck magnetic resonance angiography on May 5, slim bilateral posterior cerebral arteries.