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Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...
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Cerebral edema is a pathological increase in brain water content that disrupts intracranial pressure regulation and impairs neurological function. Because the cranial vault is rigid, even modest increases in tissue volume can compromise cerebral perfusion, distort neural structures, and initiate secondary injury. Cerebral edema develops through four principal mechanisms: vasogenic, cytotoxic, interstitial, and ionic.Vasogenic EdemaVasogenic edema arises from disruption of the blood–brain...
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Assessing Signaling Properties of Ectodermal Epithelia During Craniofacial Development
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Published on: March 24, 2011

Ichthyosis cribriformis: A new entity?

Hiram Larangeira de Almeida1, Rudolf Happle, Ulrike Blume-Peytavi

  • 1Catholic and Federal University of Pelotas, Pelotas, Brazil. hiramalmeidajr@hotmail.com

Journal of the American Academy of Dermatology
|February 19, 2008
PubMed
Summary
This summary is machine-generated.

A rare congenital skin disorder, ichthyosis cribriformis, presents as a sievelike pattern of keratotic plugs. Treatment with isotretinoin effectively reduced hyperkeratosis in this unique case.

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Area of Science:

  • Dermatology
  • Clinical Genetics

Background:

  • Ichthyosis encompasses a group of genetic skin disorders characterized by abnormal keratinization.
  • Congenital ichthyosis variants often present with scaling, dryness, and thickening of the skin.

Observation:

  • A 22-year-old woman presented with a unique congenital ichthyosis featuring numerous keratotic plugs, creating a sievelike skin appearance.
  • Histopathology revealed pronounced orthokeratosis with plugs originating from hair follicle infundibula.
  • Immunohistochemistry showed normal keratin and filaggrin expression, differentiating it from common ichthyosis types.

Findings:

  • The patient's condition, termed "ichthyosis cribriformis," is a novel presentation of congenital ichthyosis.
  • Oral isotretinoin therapy led to a significant reduction in the observed hyperkeratosis.
  • The unique morphology and normal keratin/filaggrin expression suggest a distinct pathomechanism.

Implications:

  • Ichthyosis cribriformis represents a previously undescribed variant of congenital ichthyosis.
  • This case highlights the importance of detailed histopathological and immunohistochemical analysis in diagnosing rare dermatological conditions.
  • Further research into the genetic basis and treatment of ichthyosis cribriformis is warranted.