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 ...

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 ...

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.

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 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.

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.

Feb 18, 2025 · MRI. The overall signal characteristics are variable, likely reflecting the natural course of the disease process in different phases. Several major patterns of involvement have been described 8,16: dominant signal intensity in Pagetic bone similar to that of fat; most common pattern and probably corresponds to longstanding disease

Extensive enhancement of the skull base, with associated soft tissue, involvement of the right zygomatic arch and the pterygoid muscles on the right. The temporomandibular joint on the right side is also involved.