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Related Concept Videos

Increased Intracranial Pressure l: Introduction01:14

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: Pathophysiology01:29

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...
20

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Intracranial lipomas: a retrospective study.

Z Seidl1, M Vaneckova, T Vitak

  • 1Department of Radiology, First Medical School, General Teaching Hospital, Charles University; Prague, Czech Republic - VŠZ Academy, Duškova; Prague, Czech Republic - seid@lf1.cuni.cz - man.van@post.cz.

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Intracranial lipomas, often midline malformations, are typically found incidentally. Differentiating them from other lesions on MRI is crucial for accurate diagnosis and management.

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Area of Science:

  • Neurology
  • Radiology
  • Neuroimaging

Background:

  • Intracranial lipomas are rare congenital malformations, often located near midline structures.
  • They are distinct from neoplastic tumors and can be considered hamartomas or developmental abnormalities.
  • Accurate radiological differentiation from other intracranial lesions is essential.

Purpose of the Study:

  • To analyze the imaging characteristics and clinical presentation of intracranial lipomas.
  • To highlight the importance of differentiating lipomas from other pathologies on MRI.
  • To assess the relationship between intracranial lipomas and clinical symptoms.

Main Methods:

  • Retrospective review of 17 patients with intracranial lipomas diagnosed via MR imaging between 1996 and 2006.
  • Inclusion of CT examination data for two patients.
  • Analysis of lesion location, imaging features, and correlation with clinical symptoms.

Main Results:

  • Predominant lipoma localization was observed near midline structures (corpus callosum, quadrigeminal cisterns).
  • Magnetic Resonance (MR) imaging findings require careful interpretation to distinguish lipomas from epidermoid tumors, dermoid tumors, and hemorrhagic lesions.
  • A significant percentage of patients (47%) experienced headaches, though lipomas were often incidental findings unrelated to symptoms.

Conclusions:

  • Intracranial lipomas are typically incidental findings and not the cause of neurological symptoms.
  • Accurate differentiation from other cystic or hemorrhagic lesions on neuroimaging is critical.
  • Understanding the typical midline location aids in diagnosis.