Lateral thoracic artery

Last revised by Travis Fahrenhorst-Jones on 19 Jun 2022

The lateral thoracic artery is a branch of the second part of the axillary artery

The lateral thoracic artery originates from the medial surface of the axillary artery, posterior to the distal part of pectoralis minor. It courses inferomedially along the inferior border of pectoralis minor to the anterior surface of serratus anterior.

It anastomoses with the internal thoracic and intercostal arteries 2 as well as with the superior thoracic artery 1.

The vessel was previously known as the external mammary artery 3

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Cases and figures

  • Figure 1: diagram
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  • Figure 2: axillary anatomy (Gray's illustration)
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