Fig. 3
From: Disproportionately large communicating fourth ventricle: two case reports
Disproportionately large communicating fourth ventricle coexisting with syringomyelia in patient 2. a-c Sagittal images of the fourth ventricle. c–d Sagittal images of syringomyelia. White arrow points to the dilated aqueduct (a); black arrow indicates the dilated central canal of the spinal cord communicating with the fourth ventricle (c); and black arrow points to the reopened outlet of the fourth ventricle (d)