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Azygos lobe in axial computertomography. Arrow on azygos vein. HRCT thorax, axial section delineates a well-defined, convex-shaped fold (Blue arrow), the azygos fissure. A tear-drop shaped density noted at the bottom of the fold (Green arrow) is the azygos vein.
In the right lung the upper horizontal fissure, separates the upper (superior) lobe from the middle lobe. The lower, oblique fissure separates the lower lobe from the middle and upper lobes. [1] [7] Variations in the fissures are fairly common being either incompletely formed or present as an extra fissure as in the azygos fissure, or absent
The "arch of the azygos vein" (arcus venae azygos) is an important anatomic landmark. As an anatomical variation in 1–2% of the population, the arch can be displaced laterally, thereby creating a pleural septum separating an azygos lobe from the upper lobe of the right lung. The origin and anatomical course of the azygos vein are quite variable.
Transverse basilar fissure - or Saucer's fissure; Canalis basilaris medianus; Craniopharyngeal canal; Intermediate condylar canal; Foramen arcuale; Os odontoideum; Os acromiale; Ossiculum terminale (of dens) Scapular foramina and tunnels
The root of the right lung lies behind the superior vena cava and part of the right atrium, and below the azygos vein.That of the left lung passes beneath the aortic arch and in front of the descending aorta; the phrenic nerve, pericardiacophrenic artery and vein, and the anterior pulmonary plexus, lie in front of each, and the vagus nerve and posterior pulmonary plexus lie behind.
Azygos (impar), from the Greek άζυξ, refers to an anatomical structure that is unpaired. This is relatively unusual, as most elements of anatomy reflect bilateral symmetry. Azygos may refer to: Azygos anterior cerebral artery; Azygos artery of vagina; Azygos lobe; Azygos vein; Ganglion impar
Longitudinal fissure or Medial longitudinal fissure: which divides the cerebrum into the two hemispheres. Occipitoparietal fissure: found between the occipital and parietal lobes of the brain. Wernicke's fissure: separates the brain's temporal and parietal lobes from the occipital lobe. Zygal fissure: found in the cerebrum.
The hemiazygos vein and the accessory hemiazygos vein, when taken together, essentially serve as the left-sided equivalent of the azygos vein. [2] That is, the azygos vein serves to drain most of the posterior intercostal veins on the right side of the body, and the hemiazygos vein and the accessory hemiazygos vein drain most of the posterior intercostal veins on the left side of the body. [2]