What is a fissure line?
What is a fissure line?
The vertical fissure line commences in or near the costodiaphragmatic recess and heads superomedially towards the hilum and terminates before or at the horizontal fissure. More commonly occurs on the right and may indicate partial volume loss of the lower lobe 1.
What is an accessory azygos fissure?
The azygos fissure is typically visible on chest radiography as a right paramediastinal supernumerary line in projection of the right lung apex. The azygos vein, located at the bottom of the fissure, is visible as a teardrop- shaped opacity. The empty azygos fissure is a rare finding.
What is right minor fissure?
The horizontal fissure (also called the minor fissure) is a unilateral structure in the right lung that separates the right middle lobe from the right upper lobe.
What is the major fissure?
The oblique fissures (also called the major fissures or greater fissures) are bilateral structures in both lungs separating the lung lobes.
Where is the azygos fissure located?
right lung
It is typically located in the apicomedial portion of the right lung, separated from the rest of the right upper lobe by a visible fissure, termed an azygous fissure. The fissure can be identified as a fine, convex line on a chest radiograph in the para mediastinal portion of the right lung.
What are fissures in the brain?
A fissure is a deeper grove and is often used interchangeably with sulcus. The cerebrum is divided into a left and right hemisphere by a longitudinal fissure that goes by many different names: longitudinal fissure, cerebral fissure, median longitudinal fissure, interhemispheric fissure.
What is accessory fissure?
Accessory fissures are common congenital variations. Accessory fissures generally occur between bronchopulmonary segments, as a cleft of varying depth lined by visceral pleura. They are more common in fetal and neonatal lung specimens than in adult lung specimens.
What causes an azygos fissure?
Discussion. The azygos fissure forms when the embryologic azygos vein (posterior cardinal vein) migrates through the apical portion of the right lung instead of medial to it. As the vein invaginates the lung, it creates a fissure (mesoazygos) with 4 pleural layers (2 parietal and 2 visceral).
What does azygos mean?
azygos vein, azygous vein, vena azygos(noun) one of a system of veins that drain the thoracic and abdominal walls; arises as a continuation of the right ascending lumbar vein and terminates in the superior vena cava.
Does the azygos vein originate in the abdomen?
The azygos vein freely anastomoses with the vertebral venous plexus. The hemiazygos vein is the asymmetric counterpart to the azygos vein and forms part of the azygos venous system. The hemiazygos vein is formed by the confluence of the left ascending lumbar and left subcostal veins in the abdomen (and often communicates with the left renal vein).
What is an azygos lobe?
In human anatomy, an azygos lobe is a congenital variation of the upper lobe of the right lung.It is seen in 1% of the population.
An accessory fissure is a cleft of varying depth, lined by visceral pleura in the outer surface of the lung and appears as thin white line in unusual locations through chest radiographic/computed tomographic (CT) studies.
