[Dissecting aortic aneurysm as a cause of fever of unknown origin]

Dissecting aortic aneurysm is a clinical syndrome commonly with a dramatic course and a fatal prognosis. The disease often has a fatal ending at the very beginning, a few hours after the onset. High temperature happens sometimes, but is rarely a dominant symptom. We presented a case of a patient with a long term febrile state caused by dissecting aortic aneurysm, where pleuropneumenia covered the real nature of the disease. It has been pointed out that dissecting of aorta should be thought of in patients with unclear febrile states, especially if they have difficulties in the area of thorax.