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Increased Intracranial Pressure l: Introduction

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Intracranial hypertension is a sustained elevation of intracranial pressure (ICP) above 22 mm Hg. In supine adults, normal ICP is ~7–15 mm Hg.The rigid, nonexpandable cranium contains three components—brain tissue, blood, and cerebrospinal fluid (CSF)—that total ~1,700 mL in a typical adult: 1,400 mL brain (~80%), 150 mL blood (~10%), and 150 mL CSF (~10%). According to the Monro–Kellie doctrine, total intracranial volume is effectively fixed. When one component...

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Increased Intracranial Pressure ll: Pathophysiology

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Increased intracranial pressure (ICP) refers to a potentially life-threatening rise in pressure inside the skull. This usually happens when there is a major change in the volume of brain tissue, blood, or cerebrospinal fluid (CSF) — the three components inside the skull. According to the Monro-Kellie doctrine, if the volume of one component increases, the volumes of the other components must decrease to maintain normal pressure. If this does not happen, ICP rises.The process often begins...

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Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery

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Intracranial, intradural aneurysmal bone cyst.

Jalil Afnan¹, Matija Snuderl², Juan Small³

¹Department of Radiology, Lahey Hospital and Medical Center, 41 Mall Rd, Burlington, MA 01803.

Clinical Imaging

|December 9, 2014

Summary

Aneurysmal bone cysts (ABCs) are rare, benign bone lesions. This report details an unusual intracranial, intradural ABC case in a young male, highlighting its rarity and potential for neurological symptoms.

Keywords:

Aneurysmal bone cyst Imaging Intracranial Intradural Pathology

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Area of Science:

Neurosurgery
Orthopedic Oncology
Radiology

Background:

Aneurysmal bone cysts (ABCs) are benign, expansile, osteolytic lesions.
These vascular lesions can occur within or outside bone (intraosseous or extraosseous).
ABCs can cause mass effect and alter local blood supply, often requiring intervention.

Observation:

A case of an intracranial, intradural ABC is presented.
The patient was a young male experiencing progressively severe headaches.
This represents a rare occurrence, with most ABCs being extracranial.

Findings:

The intracranial ABC caused significant mass effect and symptoms.
The intradural location is exceptionally uncommon for ABCs.
This case adds to the limited literature on intracranial ABCs.

Implications:

Intracranial ABCs, though rare, must be considered in the differential diagnosis of central nervous system lesions.
Prompt diagnosis and management are crucial due to potential mass effect.
Further research into the etiology and optimal treatment of these rare intracranial lesions is warranted.