Ndiaye Assane, Ndiaye Nafi Ba, Ndiaye Aïnina, Diop Mamadou, Ndoye Jean Marc, Dia Abdarahmane
Anatomy and Organogenesis Laboratory, Faculty of Medicine, Cheikh Anta Diop University, BP 16659, Dakar-Fann, Senegal.
Anat Sci Int. 2012 Sep;87(3):174-8. doi: 10.1007/s12565-011-0119-5. Epub 2011 Oct 28.
The azygos lobe is a rare anomaly in broncho-pulmonary segmentation due to an unusual course of the azygos vein. Its radiological aspects are well known but there are few anatomical reports about its bronchial and vascular components. The authors describe the characteristic features in a particular case of the azygos lobe observed in the right lung after studying a fresh specimen and doing a casting of said specimen. This azygos lobe was in a position medial to the right upper lobe and above the hilum. It had the shape of an egg and was 5 cm high, 4 cm wide and 2 cm thick. The azygos fissure was of a vertical form. The lobe was ventilated by the posterior branch of the apical segmental bronchus (B1a). This latter was accompanied by two apical sub-segmental arteries (A1ai, A1aii) and the apical intersubsegmental vein (V1a). The new findings were that: first, the azygos lobe bronchus supplied a part of the right upper lobe; second, the passage of the azygos vein deformed the bronchus of the right upper lobe, and not that of the azygos lobe. This means that it was the right upper lobe, rather than the azygos lobe that was predisposed to the pathology. So, in excising this type of azygos lobe, particular precautions have to be taken to spare the bronchus of the azygos lobe that supplies the right upper lobe.
奇叶是支气管肺段的一种罕见异常，由奇静脉走行异常所致。其影像学表现广为人知，但关于其支气管和血管成分的解剖学报道较少。作者在研究一个新鲜标本并对该标本进行铸型后，描述了在右肺观察到的一例奇叶的特征。该奇叶位于右上叶内侧、肺门上方。呈椭圆形，高5厘米，宽4厘米，厚2厘米。奇静脉裂为垂直型。该叶由尖段支气管（B1a）的后支通气。后者伴有两条尖段亚段动脉（A1ai、A1aii）和尖段叶间静脉（V1a）。新发现为：其一，奇叶支气管供应右上叶的一部分；其二，奇静脉的走行使右上叶支气管而非奇叶支气管变形。这意味着易发生病变的是右上叶而非奇叶。因此，在切除这种类型的奇叶时，必须特别注意保留供应右上叶的奇叶支气管。
