Jul 6, 2024 · The base of the skull (or skull base) forms the floor of the cranial cavity and separates the brain from the structures of the neck and face. The skull base and vault collectively form the neurocranium.

The long standing left middle ear / mastoid inflammation can lead to a multitude of complications, the severe one being skull base osteomyelitis. The initial inflammation has now eroded the tegmen tympani inflaming the dural lining, eroded the jugular foramen, resulting the venous sinus thrombosis. extended into clivus and occipital bone ...

Jun 28, 2024 · Skull base meningiomas can be located at the olfactory groove, tuberculum sella, sphenoid ridge, petroclival region, foramen magnum and jugular foramen 1.

Sep 10, 2024 · MRI provides excellent anatomical delineation of adjacent structures and is able to characterize the signal of the lesion usually allowing for a confident preoperative diagnosis. MRI is, however, limited in its ability to evaluate calcification and the precise involvement of skull base osteolysis less well than CT, especially for skull base ...

Dec 11, 2023 · The skull base angle (of Boogard) allows the diagnosis of platybasia and basilar kyphosis. Several different techniques may be used on sagittal images from MRI or CT. Traditionally, basal angle measurements were based on plain skull images. With the advent and generalization of MR imaging, it has been supplanted and is rarely used.

Jan 25, 2025 · MRI. MRI has excellent contrast resolution without the disadvantage of ionizing radiation, however, it lacks the essential bony detail that CT can offer. As such it is usually only performed in addition to HRCT of the base of skull 10.

Jan 21, 2024 · The cranial foramina are the holes that exist in the skull to allow the passage of structures into and out of the cranium. Some clefts/fissures, which are not entirely surrounded by bone, and canals, which are longer than their diameter, are often included in this category.

Apr 12, 2022 · Imaging consists of CT and MR studies involving the skull base. The non-expansile nature of the lesion is best evaluated at the inferior orbital fissure and Vidian canal , which are not displaced nor disrupted.

Nov 16, 2024 · MRI. MRI appearance is variable depending on the degree of lucencies versus sclerosis 2-4. T1: heterogeneous signal, usually intermediate; T2: heterogeneous signal, usually low, but may have regions of higher signal; T1 C+ (Gd): heterogeneous contrast enhancement; Treatment and prognosis

Jan 19, 2025 · Importantly CT and MRI are complementary, the former exquisitely delineating the relationship to the skull base and showing calcification within the mass, whereas the latter giving important information on signal intensity and relationship to neural structures.