List the main entities to be considered in the differential diagnosis of acute aortic syndrome: aortic dissection, intramural hematoma and penetrating atherosclerotic ulcer. Describe the radiological findings that allow differential diagnosis between these entities. Illustrate these findings from clinical cases collected in our institution.

Acute aortic syndrome comprises a group of disorders of the aorta that constitute a medical emergency. They require an accurate and early diagnosis, as they compromise the patient's life.

INTRODUCTION Acute aortic syndrome is a set of aortic abnormalities that constitute a medical emergency. It is characterized by chest pain and has a high risk of death. Instead it requires a quick and accurate diagnosis to establish an early treatment. CLINICAL SEMIOLOGY Clinical characteristics that define this pain are: Start . Abrupt, reaching its maximum intensity shortly. Characteristics . High intensity pain. It may be different depending on the clinical entity and person, although...

Acute aortic syndrome is a clinical entity whose prognosis depends on rapid and accurate diagnosis and early treatment. Contrast and without contrast CT study is the test of choice. The role of the radiologist is essential to establish the exact diagnosis and to apply the appropriate treatment as fast as possible.

1. Castañer E, Andreu M, Gallardo X, Mata JM, Cabezuelo MÁ, Pallardó Y. CT in Nontraumatic Acute Thoracic Aortic Disease: Typical and Atypical Features and Complications. RadioGraphics. 2003 Oct 1;23(suppl_1):S93–110. 2. Maddu KK, Shuaib W, Telleria J, Johnson J-O, Khosa F. Nontraumatic Acute Aortic Emergencies: Part 1, Acute Aortic Syndrome. American Journal of Roentgenology. 2014 Feb 20;202(3):656–65. 3. Macura KJ, Corl FM, Fishman EK, Bluemke DA. Pathogenesis in Acute Aortic Syndromes:...