Topics

Topic

design image
Anterior vein of right lung

The anterior vein of the right lung is a segmental pulmonary vein that drains the anterior segment (S3) of the right upper lobe. It courses anteriorly within the right lung parenchyma, passes in front of the right upper lobe bronchus and its arterial branches, and converges at the hilum to enter the right superior pulmonary vein (RSPV). The RSPV then empties into the left atrium.

The anterior vein may join with the apical (S1) and posterior (S2) veins before entering the RSPV, or it may drain separately depending on individual variation. Accurate mapping of the anterior vein is critical in pulmonary segmentectomy, lung transplantation, and pulmonary vein isolation for atrial fibrillation, as anatomical variations are common.

Synonyms

  • Right upper lobe anterior segmental vein (V3)

  • Vena anterior pulmonis dextrae

  • Tributary of right superior pulmonary vein

Function

  • Drains the anterior segment (S3) of the right upper lobe

  • May contribute venous return from adjacent S1 or S2 segments in some variants

  • Converges into the right superior pulmonary vein → left atrium

  • Provides an important anatomical and surgical landmark in thoracic and cardiac procedures

Tributaries

  • Intrapulmonary venules from the anterior segment (S3) of the right upper lobe

  • Occasionally small tributaries from apical (S1) or posterior (S2) segments

MRI Appearance

T1-weighted images:

  • Appears as a flow void (black lumen) at the right upper hilar region

  • Visualized relative to right pulmonary artery and bronchus

T2-weighted images:

  • Seen as a linear signal void; intraluminal thrombus would appear intermediate to high signal

STIR:

  • Fat suppression improves visualization of the anterior vein within the hilar fat planes

  • Perivascular edema or inflammatory changes appear hyperintense

T1 Post-Gadolinium (Gd-enhanced MRI):

  • Enhances brightly and homogeneously, outlining drainage into the RSPV

  • Filling defects correspond to stenosis or thrombus

MRI Non-Contrast Cardiac-Gated 3D Imaging:

  • Provides a 3D anatomical map of the anterior vein joining the RSPV

  • Widely used in AF ablation planning, surgical mapping, and congenital variation detection without contrast

CT Appearance

CT Post-Contrast (CT Pulmonary Venography / CCTA):

  • Contrast clearly opacifies the anterior vein, showing its confluence with the RSPV

  • Multiplanar and 3D reconstructions define segmental venous anatomy and variations

  • Useful for identifying separate ostia, anomalous pulmonary venous return, or post-ablation stenosis

CT images

Anterior vein of right lung CT axial image -img-00000-00000

CT images

Anterior vein of right lung CT axial image -img-00000-00000_00001

MRI image

Anterior vein of right lung MRI IMAGE