Thoracic aortic aneurysm (TAA) is broadly classified into ascending thoracic aneurysm, aortic arch aneurysm, and descending thoracic aneurysm based on the location of the aneurysms. TAAs frequently also have abdominal aortic extension, namely, thoracoabdominal aortic aneurysm (TAAA). The majority of TAAs are sporadic in nature and primarily affect older adults, but there are certain genetic predispositions for TAA. There are also infectious and inflammatory conditions that are associated with TAAs. Today, aortic dissection and hypertension are the common etiologies of TAA. Clinical presentation of TAA is frequently related to the etiology and location of aneurysms.