Internal thoracic vein draining into the extrapericardial part of the superior vena cava: a case report

Venkata Ramana Vollala,Bhagath Kumar Potu,Narendra Pamidi

doi:10.1590/s1677-54492008000100015

Venkata Ramana Vollala, Bhagath Kumar Potu + Show 1 more

Open Access

https://doi.org/10.1590/s1677-54492008000100015

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Abstract

The internal thoracic veins are venae comitantes of each internal thoracic artery draining the territory supplied by it and usually unite opposite the third costal cartilage. This single vein enters the corresponding brachiocephalic vein. We present a variation of right internal mammary vein draining into superior vena cava in a 45-year-old male cadaver. Likely development and clinical significance of the vein are discussed.

Highlights

Internal thoracic veins are venae comitantes to the inferior half of the internal thoracic artery
Near the third costal cartilages, the veins unite and ascend medially to the artery to end in their appropriate brachiocephalic vein
The superior vena cava is formed by the junction of the brachiocephalic veins

Summary

Introduction

Internal thoracic veins (internal mammary veins) are venae comitantes to the inferior half of the internal thoracic artery. Tributaries correspond to artery branches.[1] The superior vena cava is formed by the junction of the brachiocephalic veins. Superior vena cava tributaries are the azygos vein and small veins from the pericardium and other mediastinal structures.[1] Reported variations of superior vena cava include absence of superior vena cava,[2] persistent left superior vena cava[3] and a case of bilateral superior vena cava.[4] According to Bergman RA et al, the internal mammary vein occasionally receives the lateral thoracic veins.[5] It may drain into the superior vena cava or the azygos vein.

Results

Conclusion