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Related Concept Videos

Cytotoxic Edema: Pathophysiology01:21

Cytotoxic Edema: Pathophysiology

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 supply...
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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Bone Marrow Sampling and Transplants

Bone marrow transplant is a potential cure for several diseases, including cancer and specific genetic disorders. Notably, this procedure is applicable for patients suffering from aplastic anemia, certain types of leukemia, severe combined immunodeficiency disease (SCID), Hodgkin's disease, non-Hodgkin's lymphoma, multiple myeloma, thalassemia, sickle-cell disease, and certain cancers.
The transplant begins with high doses of chemotherapy and radiation treatment, which aim to destroy the...
Cerebral Edema l: Introduction01:19

Cerebral Edema l: Introduction

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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Updated: Jun 17, 2026

Database-guided Flow-cytometry for Evaluation of Bone Marrow Myeloid Cell Maturation
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[Bone marrow edema: definition, diagnostic value and prognostic value].

A Blum1, D Roch, D Loeuille

  • 1Service d'Imagerie Guilloz, Hôpital central, CHU Nancy, 29, avenue du Maréchal de Lattre de Tassigny, 54035 Nancy cedex. alain.blum@gmail.com

Journal De Radiologie
|December 25, 2009
PubMed
Summary
This summary is machine-generated.

Bone marrow edema on MRI is a misnomer, as histological findings vary and often show fibrosis or inflammation, not true edema. Its detection is crucial for diagnosis and prognosis in various bone conditions.

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Area of Science:

  • Radiology
  • Histopathology
  • Medical Imaging

Context:

  • Bone marrow edema (BME) is a common MRI finding, characterized by T1W hypointensity and T2W hyperintensity.
  • The term 'edema' is histologically inaccurate, as findings often include fibrosis or inflammatory infiltrates, varying with etiology.
  • In France, 'osteitis' is preferred for marrow signal changes in rheumatic diseases.

Purpose:

  • To review the imaging features of bone marrow edema.
  • To discuss the underlying etiologies of bone marrow signal changes.
  • To evaluate the diagnostic and prognostic value of detecting bone marrow edema.

Summary:

  • MRI findings of T1W hypointense and T2W hyperintense bone marrow are often mislabeled as 'edema'.
  • Histological examination reveals diverse abnormalities, frequently involving fibrosis or inflammation, rather than true edema.
  • Despite the misnomer, detecting these marrow signal changes is vital for diagnosis, prognosis, and management, particularly in rheumatic conditions.

Impact:

  • Highlights the discrepancy between MRI terminology and histological findings for bone marrow abnormalities.
  • Emphasizes the clinical significance of recognizing these changes for patient management and disease assessment.
  • Suggests diffusion-weighted MRI may offer enhanced sensitivity for detecting bone marrow inflammation.