Lateral thoracic artery

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.

Previously known as the external mammary artery 3

Upper limb anatomy
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Article information

rID: 29046
System: Vascular
Section: Anatomy
Tag: cases
Synonyms or Alternate Spellings:
  • External mammary artery

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Cases and figures

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