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, an anomaly of the posterior cranial fossa, also known as Arnold–Chiari malformation, was described in autopsies by Hans Chiari, an Austrian pathologist, in 1891. He defined four ...

Arachnoid cysts (ACs) are benign, discrete pockets of CSF (cerebrospinal fluid) or CSF-like fluids, accounting for 1% of all intracranial space-occupying lesions. Commonly observed during childhood, ...

We present a case of unilateral lid retraction secondary to orbital fat entrapment in the orbital roof of a patient with chronic hydrocephalus. A 39-year-old female patient was referred with a 5-year ...

Cranial nerves are pairs of nerves that connect your brain to different parts of your head, neck, and trunk. Each nerve has a corresponding roman numeral between i and xii. Your cranial nerves are ...

Arachnoid Cyst of the Middle Cranial Fossa: (Left) T1-weighted axial MRI; (Right) T2-weighted axial MRI. Note the small cyst in the right middle cranial fossa, anterior to the temporal lobe. The cyst ...