Dissecting aortic aneurysm presenting as pyrexia of unknown origin: report of a case.

We describe herein the case of a 51-year-old woman with a dissecting aneurysm of the aorta who presented with pain in the chest followed by prolonged pyrexia of unknown origin (PUO) lasting 6 weeks. Because of the fever associated with a murmur of aortic regurgitation, she was initially misdiagnosed as having infective endocarditis. This unusual case serves to remind us that clinicians should bear in mind the possibility of aortic dissection in patients presenting with PUO.