Internal mammary artery aneurysms are rarely detected, with only a few cases caused by physical trauma, connective tissue diseases, and vasculitis having been reported. We describe the case of a 52-year-old woman diagnosed with a right internal mammary artery aneurysm several months after experiencing a DeBakey Ⅲ acute aortic dissection. The artery had an indication of dissection that seemed to have caused the aneurysm. Thoracoscopic resection was performed, and the patient recovered with no major complications.
Keywords: Internal mammary artery aneurysm; Thoracoscopic surgery.