Malignancy Associated Aortitis in a Patient with Fever of Unknown Origin

Aortitis, characterized by inflammatory changes in the aortic wall, can present with various manifestations. It should be considered in the differential diagnosis of fever of unknown origin (FUO), especially in patients with aortic aneurysm. Accurate differentiation between infectious and non-infectious aortitis is essential for appropriate treatment. Clinicians must also remain vigilant regarding the potential malignancy risk in patients with vasculitis during initial evaluation and follow-up. This study presents a case of malignancy-associated large vessel vasculitis identified in a patient with FUO.