Leptomeningeal cyst | Figure 1
Leptomeningeal cyst
Coronal (image 1) and axial (image 2) CT show herniation of a gyrus (arrow) through a remote right parietal skull fracture, which is further highlighted on a 3D reformatted image (image 3). Gyrus herniation can lead to a growing skull fracture, also known as a leptomeningeal cyst. These fractures occur in young children. As the brain, meninges, and cerebrospinal fluid herniate, they exert pressure on the surrounding skull, causing the fracture to 'grow'.