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Related Concept Videos

Cranial Bones: Superior and Posterior View01:14

Cranial Bones: Superior and Posterior View

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The superior view of the cranium shows the frontal and paired parietal bones.
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...
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Cranial Bones: Lateral View01:27

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The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
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Overview of the Skull01:08

Overview of the Skull

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The cranium (skull) is the skeletal structure of the head that supports the face and protects the brain. It is subdivided into the facial bones and the brain case, or cranial vault. The facial bones underlie the facial structures, form the nasal cavity, enclose the eyeballs, and support the teeth of the upper and lower jaws.
The cranial vault surrounds and protects the brain and houses the middle and inner ear structures. This cavity is bounded superiorly by the rounded top of the skull, which...
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Sutures of the Skull01:22

Sutures of the Skull

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The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...
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Bone Markings01:26

Bone Markings

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Bones have various surface features that help form joints and attach to other soft tissues. Depending on the function, bone markings are categorized into articulating projections, processes for attachment, depressions, and openings.
Articulating Projections
Articulating projections are found where two bones meet to form a joint. These structures are usually found at the ends of bones. The largest articulation is a rounded projection called the head, supported by a narrow neck at the ends of...
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Related Experiment Video

Updated: Nov 1, 2025

Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery
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Posterior Skull Base Anatomy and Pathology.

Yuh-Shin Chang1, Gul Moonis2, Amy F Juliano3

  • 1Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA.

Seminars in Ultrasound, CT, and MR
|June 20, 2021
PubMed
Summary

Posterior skull base lesions are uncommon findings. This review details imaging features of common posterior skull base pathologies on CT and MR to differentiate urgent from non-urgent conditions.

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Area of Science:

  • Radiology
  • Neuroradiology
  • Medical Imaging

Background:

  • Posterior skull base lesions are rare radiological findings.
  • They can be incidental or symptomatic, with varied etiologies including inflammatory, neoplastic, or benign variants.
  • Accurate differentiation is crucial for appropriate patient management.

Purpose of the Study:

  • To review the imaging features of common posterior skull base pathologies.
  • To establish a systematic approach for evaluating posterior skull base lesions.
  • To aid in differentiating lesions requiring urgent intervention from benign findings.

Main Methods:

  • Review of imaging features on computed tomography (CT) and magnetic resonance (MR) examinations.
  • Focus on commonly encountered pathologic conditions.
  • Emphasis on differentiating benign from malignant or inflammatory processes.

Main Results:

  • Detailed description of imaging characteristics for various posterior skull base lesions.
  • Highlighting key features that distinguish inflammatory, neoplastic, and benign conditions.
  • Illustrating the utility of CT and MR in lesion characterization.

Conclusions:

  • A systematic imaging approach is essential for posterior skull base lesions.
  • Understanding imaging features aids in differentiating urgent from non-urgent pathologies.
  • Accurate radiological assessment prevents misinterpretation and guides clinical management.