Related Experiment Video
Updated: May 31, 2026
09:41
Comprehensive Autopsy Program for Individuals with Multiple Sclerosis
Published on: July 19, 2019
Chronic cerebrospinal venous insufficiency and multiple sclerosis.
Bridget A Bagert1, Ellen Marder, Olaf Stüve
1Department of Neurology, Ochsner Clinic Foundation, 4429 Clara St, Ste 440, New Orleans, LA 70115, USA. bbagert@ochsner.org
Archives of Neurology
|July 13, 2011
Summary
Recent studies suggest chronic cerebrospinal venous insufficiency (CCVI) may cause multiple sclerosis (MS). However, further investigation has failed to confirm this link, raising doubts about CCVI
Area of Science:
- Neurology
- Vascular Medicine
Background:
- A recent hypothesis links chronic cerebrospinal venous insufficiency (CCVI) to the etiology of multiple sclerosis (MS).
- This theory suggests a potential causal relationship between venous drainage abnormalities and MS development.
Purpose of the Study:
- To critically evaluate the scientific evidence supporting the proposed link between CCVI and MS.
- To identify methodological limitations in studies investigating this association.
Main Methods:
- Review and analysis of scientific literature on CCVI and MS.
- Critical assessment of the methodologies employed in original research.
- Examination of potential biases and confounding factors in existing studies.
Main Results:
- Independent investigations over the past two years have not corroborated the proposed association between CCVI and MS.
- Methodological flaws, including bias and confounding, were identified in the original studies.
- The current body of evidence does not support the existence of CCVI as a cause of MS.
Conclusions:
- The proposed etiological role of CCVI in MS is not supported by current scientific evidence.
- Methodological weaknesses in prior research undermine the validity of the CCVI-MS hypothesis.
- Further research is needed to clarify the relationship, if any, between venous abnormalities and MS.
Related Concept Videos
01:19Multiple Sclerosis l: Introduction
Multiple sclerosis is a chronic autoimmune disease of the central nervous system (CNS) that affects the brain, spinal cord, and optic nerves. It is an inflammatory demyelinating disorder and a leading cause of neurological disability in young adults.EpidemiologyMS commonly begins between 20 and 40 years of age and is twice as common in women. Its exact cause remains unclear, but genetic susceptibility contributes, with higher risk in first-degree relatives and identical twins. A greater...
01:22Cerebral 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...
01:20Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies
The key difference between Superficial Vein Thrombosis (SVT) and Deep Vein Thrombosis (DVT) lies in their location and severity.Clinical ManifestationsSVT typically presents with localized pain, tenderness, and redness along the course of a superficial vein, often accompanied by a palpable, cord-like structure under the skin. This condition is usually less dangerous than DVT but can be uncomfortable and may lead to complications such as cellulitis or, rarely, a clot extension into the deep...
01:29Increased Intracranial Pressure ll: Pathophysiology
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 with...
01:14Increased Intracranial Pressure l: Introduction
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 expands, CSF and venous blood...
01:19Veins of Head and Neck
The blood drainage from the head and neck is primarily managed by three pairs of veins: the external jugular, internal jugular, and vertebral veins. The external jugular veins drain superficial scalp and face structures, passing over the sternocleidomastoid muscles to empty into the subclavian veins.
On the other hand, the vertebral veins, unlike their arterial counterparts, are not primarily responsible for brain drainage. Instead, they drain the cervical vertebrae, spinal cord, and some small...
On the other hand, the vertebral veins, unlike their arterial counterparts, are not primarily responsible for brain drainage. Instead, they drain the cervical vertebrae, spinal cord, and some small...