Related Experiment Video
Updated: Aug 9, 2026
18:50
Microsurgical Clip Obliteration of Middle Cerebral Aneurysm Using Intraoperative Flow Assessment
Published on: September 25, 2009
Cerebral arteriovenous malformations associated with a straight sinus anomaly
T Minakawa1, R Tanaka, T Koike
1Department of Neurosurgery, Brain Research Institute, Niigata University, Japan.
Neurosurgery
|July 1, 1992
Summary
Straight sinus anomalies are rare but appear more common in patients with deep cerebral arteriovenous malformations (AVM). These AVMs often drain abnormally, showing retrograde flow or unusual venous pathways.
Area of Science:
- Neurology
- Radiology
- Vascular Malformations
Background:
- Cerebral arteriovenous malformations (AVM) are complex vascular lesions.
- Straight sinus anomalies are rare congenital abnormalities of the venous system.
Observation:
- Angiographic studies revealed nine cases of cerebral AVM associated with straight sinus anomalies.
- All ten AVMs were located in deep cerebral structures, including the basal ganglia, corpus callosum, and medial occipital/temporal lobes.
Findings:
- Six patients with deep AVMs showed minimal straight sinus filling, with drainage via the vein of Galen and retrograde flow in deep cerebral veins or persistent facial sinus.
- Three patients presented with duplication or septal formation of the straight sinus.
Implications:
- Deep-seated cerebral AVMs may have a higher association with straight sinus anomalies than previously recognized.
- Understanding these associations is crucial for accurate diagnosis and treatment planning of complex AVMs.
Related Concept Videos
01:18Anatomy of the Brain: Ventricles
There are hollow fluid-filled cavities known as ventricles deep inside the human brain. There are two lateral ventricles, one in each cerebral hemisphere, and each has three different projections — the anterior, inferior, and posterior horns visible from the lateral side. A thin membrane called the septum pellucidum separates the two lateral ventricles. The slender third ventricle in the diencephalon is connected to each lateral ventricle via a channel called the interventricular foramen. The...
01:10The Arch of Aorta
The coronary arteries, originating from the ascending aorta, bifurcate from two sinuses located within the ascending aorta. Positioned just above the aortic semilunar valve, these sinuses house essential aortic baroreceptors and chemoreceptors, crucial for maintaining cardiac function. The left coronary artery and the right coronary artery branch off from the left posterior and anterior aortic sinuses, respectively.
Encircling the heart, the coronary arteries form a ring-like structure before...
Encircling the heart, the coronary arteries form a ring-like structure before...
01:26Arteries of the Head and Neck
The human body's intricate network of arteries ensures that every organ system receives the necessary oxygen and nutrients for optimal function. The arterial network in the head and neck region is particularly complex, providing vital blood flow to the brain, eyes, and other critical structures. Prominent arteries in this region include the internal carotid arteries and the vertebral arteries.
The internal carotid arteries supply blood to the anterior portion of the cerebrum. They enter the...
The internal carotid arteries supply blood to the anterior portion of the cerebrum. They enter the...
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...
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...
01:22Cerebral 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...