• thoracic
  • A 59-year old man being investigated for back pain was found to have aneurysmal dilatation of a right-sided aortic arch and descending thoracic aorta together with an aberrant left subclavian artery. (diseaseinfosearch.org)
  • internal
  • Ehlers-Danlos syndrome type 4, caused by mutations of the COL3A gene, leads to defective production of the collagen, type III, alpha 1 protein and causes skin fragility as well as weakness of the walls of arteries and internal organs. (wikipedia.org)