Related Experiment Video

Updated: Jan 21, 2026

Modeling Brain Metastasis by Internal Carotid Artery Injection of Cancer Cells
10:01

Modeling Brain Metastasis by Internal Carotid Artery Injection of Cancer Cells

Published on: August 2, 2022

8.0K

Long segment dolichoectasia of the right internal carotid artery diagnosed by CT angiography

Akira Uchino1, Shinya Kohyama2

  • 1Department of Diagnostic Radiology, Saitama Medical University International Medical Center, 1397-1 Yamane, Hidaka, Saitama 350-1298, Japan.

Radiology Case Reports
|July 25, 2019
PubMed

Insights

Dolichoectasia, a rare arterial condition, typically affects older individuals. This case highlights a unique long-segment dolichoectasia of the internal carotid artery in a normotensive woman presenting with transient ischemic attack.

Area of Science:

  • Neurology
  • Vascular Medicine
  • Radiology

Background:

  • Cerebral artery dolichoectasia is a rare vascular disorder characterized by arterial dilatation, elongation, and tortuosity.
  • It most commonly affects the vertebrobasilar system in elderly, hypertensive patients, often linked to atherosclerosis.
  • Carotid system involvement is less common, usually limited to short segments of the internal carotid artery (ICA) or anterior cerebral artery.

Observation:

  • This report details an unusual case of extensive dolichoectasia.
  • The condition involved a long segment of the right internal carotid artery, extending from the upper cervical to the terminal portions.
  • The patient was a 66-year-old woman with no history of hypertension.

Findings:

  • Computed tomography angiography (CTA) confirmed the diagnosis of dolichoectasia.
  • The extensive nature of the dolichoectasia in the internal carotid artery was a key finding.
  • The patient presented with symptoms of a transient ischemic attack.

Implications:

  • This case expands the understanding of dolichoectasia presentation, particularly in the carotid system.
  • It underscores the importance of advanced imaging like CTA in diagnosing rare vascular anomalies.
  • Further research may elucidate risk factors and optimal management for such extensive dolichoectatic segments.

Keywords:
Arterial malformationCT angiographyDolichoectasiaInternal carotid artery

More Related Videos

Mouse Microsurgery Infusion Technique for Targeted Substance Delivery into the CNS via the Internal Carotid Artery06:41

Mouse Microsurgery Infusion Technique for Targeted Substance Delivery into the CNS via the Internal Carotid Artery

Published on: January 31, 2017

11.5K
A Rat Carotid Artery Pressure-Controlled Segmental Balloon Injury with Periadventitial Therapeutic Application06:53

A Rat Carotid Artery Pressure-Controlled Segmental Balloon Injury with Periadventitial Therapeutic Application

Published on: July 9, 2020

5.5K

Related Concept Videos

Internal Energy02:00

Internal Energy

The total of all possible kinds of energy present in a substance is called the internal energy (U), sometimes symbolized as E. Suppose a system with initial internal energy, Uinitial, undergoes a change in energy (transfer of work or heat), and the final internal energy of the system is Ufinal. Change in internal energy equals the difference between Ufinal and Uinitial.
36.6K
Internal Energy01:29

Internal Energy

The internal energy of a thermodynamic system is the sum of the kinetic and potential energies of all the molecules or entities in the system. The kinetic energy of an individual molecule includes contributions due to its rotation and vibration, as well as its translational energy. The potential energy is associated only with the interactions between one molecule and the other molecules of the system. Neither the system's location nor its motion is of any consequence as far as the internal...
6.9K
Diagnosing Acidosis and Alkalosis01:24

Diagnosing Acidosis and Alkalosis

Diagnosing acid-base imbalances involves systematically analyzing arterial blood samples, focusing on three key measurements: pH, bicarbonate (HCO3−) concentration, and carbon dioxide partial pressure (PCO2). This analysis follows a four-step process that helps identify the imbalance's underlying cause and nature.
First, the pH level is assessed to determine whether the blood pH is normal (7.35–7.45), low (acidosis), or high (alkalosis).
Next, the PCO2  and...
1.1K
Internal Receptors01:31

Internal Receptors

Many cellular signals are hydrophilic and therefore cannot pass through the plasma membrane. However, small or hydrophobic signaling molecules can cross the hydrophobic core of the plasma membrane and bind to internal, or intracellular, receptors that reside within the cell. Many mammalian steroid hormones use this mechanism of cell signaling, as does nitric oxide (NO) gas.
74.3K
International System of Units01:29

International System of Units

The International System of Units, known as the SI system, is a universally accepted measurement system recognized and used worldwide. The SI system is based on a set of three base units considered absolute, and their values do not change with location. These base units are meters, kilograms, and seconds.
Prefixes are used to define both larger and smaller quantities in the SI system. For example, milli, micro, and nano define smaller quantities, while kilo, mega, and giga are used to define...
4.8K
External and Internal Respiration01:24

External and Internal Respiration

External respiration occurs in the lungs, and it is the first step in the journey of oxygen inside the body. When we inhale, oxygen enters our lungs and diffuses across the thin alveolar membrane. The alveoli are tiny, air-filled sacs that provide a vast surface area for gas exchange. Oxygen in the alveoli has a higher partial pressure (105 mmHg) than in the adjacent pulmonary capillaries (40 mmHg), establishing a pressure gradient. As a result, oxygen molecules move from the alveoli into the...
7.2K