CTICasesLateral Costal Artery Anatomic Variant
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[...]. Lateral Costal Artery Anatomic Variant. CTICases. Published October 3, 2014. https://str-case-explorer.pages.dev/c/ns7u5
Imaging findings
CT imaging shows bilateral arteries arising from the internal mammary arteries that track laterally in the subcostal or extrapleural space.
Key takeaways
This anatomic variant is known as the lateral costal artery, occurring in approximately 15% to 30% of cases. Recognizing this vessel is clinically important because it can act as a source of coronary-subclavian steal syndrome in patients who have undergone bypass grafting with the left internal mammary artery (LIMA), and it can occasionally be utilized as a bypass graft itself.
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