Published on 13/02/2015 by admin
Filed under Cardiothoracic Surgery
Last modified 22/04/2025
This article have been viewed 2909 times
Chapter 3
AXIAL
CORONAL
A thin, well-defined linear structure representing an inferior accessory fissure. An inferior accessory fissure segregates the medial basal segment of either lower lobe from the remaining basal segments. This variation is a common finding in the population and generally of no clinical significance.
A thin, curvilinear structure extends through the medial right upper lobe, representing an azygos fissure—the lung subtended by the azygos fissure is referred to as the azygos lobe. The azygos vein courses through the azygos fissure. This anomaly is formed when the azygos vein extends into the right upper lobe during fetal development. The azygos fissure consists of 4 layers of pleura: 2 of visceral pleura and 2 of parietal pleura. This finding is a usually an incidentally detected anomaly, without clinical significance, and is found in 0.3% to 0.5% of the population.
An anomalous bronchus originating directly from the right lateral trachea wall—this anomaly is known as a tracheal bronchus. A tracheal bronchus supplies all or a portion of the apical segment of the right upper lobe and is found in 0.1% of the population.
The coronal projection of the patient shown in Axial 3. The right upper lobe tracheal bronchus is seen to advantage.
Netters Correlative Imaging Cardiothoracic Anatomy
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