Lobus venae azygos

X-ray lobe of the azygos vein. The arrowheads point to the additional lobe gap. The arrow points to the azygos vein at the bottom of it.

Lobus venae azygos in the axial computed tomography section. The arrow points to the azygos vein, which runs through the additional lobe gap.

An azygous lobe is a common anatomical variant when part of the right upper lobe of the lung develops upward medial to the azygous vein during fetogenesis .

It was first described by Heinrich August Wrisberg in 1777.

While the azygos vein normally runs directly at the mediastinum from back to front to the superior vena cava , in this variant it runs through the additional lobe gap or at the bottom of the same. Because of the course of this azygoseptum from back to front, a lobus venae azygos is usually clearly recognizable in the form of a drop in the normal chest x-ray , the belly of the drop corresponding to the axially struck azygos vein.

The variant usually has no disease value, but should be known prior to thoracic surgery so that it can be taken into account if necessary.

literature

• Müller, Fraser, Colman, Paré: Radiologic Diagnosis of Diseases of the Chest . WB Saunders Company, 2001, ISBN 0-7216-8808-X

Web links

Commons : Lobus venae azygos  - Collection of images, videos and audio files

Individual evidence

1. ↑ E. Meyer, A. Nilles: Pseudotumor in the Azygoseptum . In: Fortschr. Röntgenstrasse Georg Thieme Verlag, Stuttgart / New York 1989.