What is Intersegmental fissure?
The left intersegmental fissure, which separates the medial segment of the left lobe from the lateral segment, can be divided into cranial, middle, and caudal sections.
What is the right intersegmental fissure?
The right hepatic vein courses in the right intersegmental fissure, separating the posterior from the anterior segment of the right lobe. Each of these segments is divided into 2 subsegments by the portal elements. In the lateral segments of the left lobe the left portal vein forms the intersegmental border.
What is a liver fissure?
The porta hepatis, located on the inferior surface of the liver, forms a deep fissure which runs transversely between the upper ends of the ligamentum teres fissure and the gallbladder fossa (1).
What is segment 4b of the liver?
segment 4 (IV) lies between the left and middle hepatic veins; it is subdivided into 4a (IVa) (superior) and 4b (IVb) (inferior) subsegments. easy tip: 4a is above and 4b is below the portal plane. segment 4 includes the quadrate lobe.
What is the meaning of Intersegmental?
: occurring between or involving two or more segments intersegmental spinal ligaments specifically : lying between somites intersegmental nerves.
Are portal veins Intersegmental vs Intersegmental?
The major branches of the portal veins run centrally within the segments (intrasegmental) with the exception of the ascending portion of the left portal vein, which runs in the left intersegmental fissure.
What delivers blood to the liver?
The liver receives a blood supply from two sources. The first is the hepatic artery which delivers oxygenated blood from the general circulation. The second is the hepatic portal vein delivering deoxygenated blood from the small intestine containing nutrients.
Which vessel course has main lobar fissure?
The middle hepatic vein courses in the main lobar fissure and enters the anterior or right anterior surface of the inferior vena cava. The middle hepatic vein commonly forms a common trunk with the left hepatic vein.
What are fissures in lungs?
A pulmonary fissure is a boundary between the lobes in the lungs. Its segmentation is of clinical interest as it facilitates the assessment of lung disease on a lobar level.
What is the main lobar fissure?
(a) Main lobar fissure: Runs obliquely between the neck of the gallbladder and right portal vein. Contains the middle hepatic vein and separates the right and left hepatic lobes.
How common are lesions on liver?
Liver lesions are abnormal clumps of cells in your liver, and they are very common. They will be detected in as much as 30% of people over 40 who undergo imaging tests. 1 The majority of liver lesions are benign (not harmful) and don’t require treatment.
What are Intersegmental grooves?
intersegmental groove: (Annelida: Oligochaeta) In earthworms, a circumferential depression of strongly contracted specimens that contains the intersegmental furrow.
Where is the interlobar fissure located in the liver?
The interlobar fissure separating the right and left lobes is oriented along a line passing through the gallbladder fossa inferiorly and the middle hepatic vein superiorly. Although this fissure is well formed in some patients, it may be incomplete in others.
What are the different types of liver fissures?
Ultrasound can identify the fissures associated with the liver due to the fat and collagen within and around them, which makes them highly reflective relative to liver parenchyma. Types of liver fissures include main lobar fissure, left intersegmental fissure]
How is the left lobe of the liver separated?
(a) Left lobe: Anatomically separated from the right lobe by the falciform ligament on its superior surface. Divided from the caudate lobe by the fissure for the ligamentum venosum and on its inferior (visceral) surface from the quadrate lobe by the fissure for the ligamentum teres.