Nasopharynx
10.1055/b-0034-102678 Nasopharynx The roof of the nasopharynx is formed by the sphenoid sinus and upper clivus. The posterior margin is formed by the lower clivus and upper cervical spine. Anteriorly…
Temporomandibular Joint
10.1055/b-0034-102677 Temporomandibular Joint The osseous components of the temporomandibular joint (TMJ) include the mandibular condyle, glenoid (mandibular) fossa, and, anteriorly, the articular tubercle (the bony eminence of the temporal bone)….
Visual Pathway
10.1055/b-0034-102674 Visual Pathway At the optic chiasm, the axons from the nasal half of the retina cross to the contralateral optic tract. The axons from the temporal half of the…
Skull Base
10.1055/b-0034-102670 Skull Base Addressing normal anatomy, the sphenoid bone forms the foundation of the central skull base. It forms the floor of the middle cranial fossa, provides structure for the…
Infection and Inflammation
10.1055/b-0034-102665 Infection and Inflammation Parenchymal Abscess The typical appearance on MR and CT of a brain abscess is that of a round mass lesion with central necrosis, demonstrating a distinctive…
Vascular Lesions
10.1055/b-0034-102664 Vascular Lesions Aneurysms The incidence in the normal population of saccular (berry) aneurysms differs widely between reports, but is likely well below 5%. They are multiple in 15% of…
Cerebrospinal Fluid Disorders
10.1055/b-0034-102669 Cerebrospinal Fluid Disorders Obstructive Hydrocephalus, Intraventricular This entity is defined by obstruction proximal to the foramina of Luschka and Magendie. It can be acute or chronic (compensated) ( Fig….
Nonneoplastic Cysts
10.1055/b-0034-102668 Nonneoplastic Cysts Arachnoid Cyst Arachnoid cysts are common, benign, CSF filled lesions. They represent 1% of all intracranial masses. In terms of etiology, they can be congenital, inflammatory, or…
Congenital Malformations
10.1055/b-0034-102655 Congenital Malformations MR is the modality of choice for evaluation of all congenital malformations of the brain, with the exception of the craniosynostoses. In individual instances, some findings may…
