Sahai Aarti N, D'Alesio Liliana M, Dugaesescu Andrew L, Bauman Jay M
Anatomical Sciences, Saint Louis University School of Medicine, St. Louis, USA.
Cureus. 2025 May 9;17(5):e83800. doi: 10.7759/cureus.83800. eCollection 2025 May.
During routine dissection of the thoracic cavity, a rare variation of the azygos system of veins was observed. The hemiazygos vein and the accessory hemiazygos vein generally course posterior to the aorta to form anastomoses with the azygos vein. However, in this case, the hemiazygos vein and the accessory hemiazygos vein anastomosed together into a vessel that crossed anterior to the thoracic aorta before draining into the azygos vein on the right side of the thoracic cavity. This variation is also known as an "interazygos vein." While the venous system is recognized for its variability, a preaortic anastomosis is particularly rare. A literature review was conducted to investigate the morphology of previous reports of preaortic hemiazygos anastomoses and interazygos veins. It was determined that the term "interazygos vein" encompasses a range of morphological variations. Awareness of the interazygos vein is important clinically to avoid mediastinal misdiagnoses and surgical complications.
在胸腔常规解剖过程中，观察到一种罕见的奇静脉系统变异。半奇静脉和副半奇静脉通常走行于主动脉后方，与奇静脉形成吻合。然而，在该病例中，半奇静脉和副半奇静脉相互吻合形成一条血管，该血管在汇入胸腔右侧的奇静脉之前，于胸主动脉前方交叉。这种变异也被称为“奇静脉间静脉”。虽然静脉系统以其变异性而闻名，但主动脉前吻合尤其罕见。进行了文献综述以研究先前关于主动脉前半奇静脉吻合和奇静脉间静脉报告的形态学。结果确定“奇静脉间静脉”这一术语涵盖了一系列形态学变异。认识到奇静脉间静脉在临床上对于避免纵隔误诊和手术并发症很重要。
