INTERNAL THORACIC VEINS (internal mammary veins)

ORIGIN: Venae comitantes of internal thoracic artery

COURSE/DRAINAGE: They begin initially as venae comitantes of the internal thoracic artery at its bifurcation to musculophrenic artery and the superior epigastric artery behind the 6th intercostal space. They begin by the union of the venae comitantes of the superior epigastric artery and musculophrenic artery. They ascend with the internal thoracic artery to the 3rd costal cartilage behind the upper 6 costal cartilages, where they become a single vein on each side (left or right) that  runs upwards, medial to the artery. Each vein ends by entering its corresponding brachiocephalic vein, i.e. left or right.

TRIBUTARIES:

bullet

Pericardiacophrenic vein

bullet

Mediastinal veins

bullet

Pericardial veins

bullet

Sternal veins

bullet

Anterior intercostal veins

bullet

Perforating veins

bullet

Musculophrenic veins

bullet

Superior epigastric veins.

All the above are in most cases venae comitantes which accompany the corresponding arteries.

 

There is nothing in anatomy not found in this website