Diagnostic delay in a 66-year-old female patient with Stanford type B dissection. This patient had a history of coronary stent insertion 2 years ago. The patient presented with acute chest pain to the emergency department. Emergent coronary angiography showed no significant stenosis in the coronary arteries. A Stanford type B aortic dissection (arrowheads) is noted on a trans-axial CT image at the level of aortic arch obtained 24 hours after coronary angiography.