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Related Concept Videos

Cellular Injury IV: Necrosis01:16

Cellular Injury IV: Necrosis

97
Necrosis is a form of irreversible cell death caused by severe injury such as ischemia, toxins, or trauma. Unlike programmed cell death, it is an uncontrolled, pathological process that typically provokes inflammation in surrounding tissues.Pathophysiologic ChangesNecrosis begins when cells sustain critical damage, leading to swelling of organelles, particularly mitochondria, and rapid ATP depletion. As energy levels decline, membrane ion pumps fail, leading to calcium influx and eventually,...
97
Cytotoxic Edema: Pathophysiology01:21

Cytotoxic Edema: Pathophysiology

31
Cytotoxic edema is a form of cerebral edema characterized by intracellular swelling of neurons, astrocytes, and other glial cells. It develops when the mechanisms responsible for maintaining ionic gradients across the cell membrane become impaired. Under normal physiological conditions, the sodium–potassium ATPase actively transports sodium ions out of the cell and potassium ions into the cell, preserving osmotic balance and enabling electrical signaling. This pump requires a continuous...
31
Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

31
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...
31
Cerebral Edema l: Introduction01:19

Cerebral Edema l: Introduction

35
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...
35
Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

57
A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...
57
Necrosis01:16

Necrosis

5.3K
Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
5.3K

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Related Experiment Video

Updated: May 6, 2026

Stem Cell Transplantation Strategies for the Restoration of Cognitive Dysfunction Caused by Cranial Radiotherapy
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Cerebral radiation necrosis.

Angelika Na1, Neda Haghigi, Katharine J Drummond

  • 1Department of Neurosurgery, The Royal Melbourne Hospital, Melbourne, Victoria, Australia.

Asia-Pacific Journal of Clinical Oncology
|November 2, 2013
PubMed
Summary
This summary is machine-generated.

Radiation necrosis (RN) of the brain is a severe, often irreversible injury following radiotherapy. Current treatments like steroids and surgery only manage symptoms, highlighting the need for new therapeutic strategies.

Keywords:
brain neoplasmpseudoprogressionradiation inducedradiation necrosis

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Area of Science:

  • Neurology
  • Radiation Oncology
  • Radiology

Background:

  • Cerebral radiation-induced injury encompasses acute edema and late, irreversible radiation necrosis (RN).
  • Cerebral RN presents significant challenges due to poor treatment response, permanent neurological deficits, and potential mortality.

Observation:

  • This review synthesizes literature on cerebral RN following radiotherapy for brain and head/neck lesions.
  • Clinical features, imaging findings (CT/MRI), pathophysiology, and treatment options for cerebral RN are discussed.

Findings:

  • Radiation necrosis (RN) is a critical differential diagnosis for new enhancing lesions post-radiotherapy, alongside tumor recurrence.
  • Existing treatments for cerebral RN, including steroids and surgery, primarily address mass effect without reversing the underlying pathology.

Implications:

  • Further research is essential to develop chemoradiotherapy protocols balancing tumor control and minimizing RN risk.
  • There is an urgent need for novel experimental treatments that can effectively reverse the pathological processes of radiation necrosis.