Arachnoid Cyst of the Posterior Cranial Fossa: (Left) T1-weighted axial MRI; (Right) T2-weighted axial MRI. Note the large cystic lesion in the posterior fossa. As the cyst contains fluid, it is dark ...
Chiari malformation type I (CMI) is a congenital neurological disorder characterized by the herniation of cerebellar tonsils through the foramen magnum, leading to impaired cerebrospinal fluid (CSF) ...