artery

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There are two main vascular structures feeding the breast called the internal mammary artery (IMA) and lateral thoracic artery (LTA), and the growth and spread of tumor cells occur via these vessels.
The musculocutaneous and fasciocutaneous mammary branches of the lateral thoracic artery provide about 30% of the blood supply to the breast.
It was observed that in the right upper limb, the lateral thoracic artery, thoraco-dorsal, circumflex scapular and posterior circumflex scapular artery arises from a common trunk from the second part of axillary artery underneath the pectoralis minor muscle (picture 1).