A Rare Cause of Abdominal Pain and Fever of ID Unknown Origin: Takayasu Arteritis.

Fever of unknown origin has three most common etiologic categories in children including infectious diseases, connective tissue diseases, and neoplasms. Takayasu arteritis is a chronic vasculitis involving the large vessels, which generally presents with clinical features of vascular sequelae such as abdominal pain, hypertension, headaches and fever. In this article, we are presenting a 11 year-old girl admitted with fever lasting for one month and abdominal pain. Her physical examination and biochemical parameters were all within normal limits except for fever, abdominal pain and elevated acute phase reactant. Exclusion of infectious diseases, neoplasms and juvenile idiopatic arthritis, systemic lupus erythematosus; and demonstration of increased wall thickness in superior mesenteric artery and bilateral carotid arteries, established the diagnosis of Takayasu arteritis. It has been emphasized that fever of unknown origin and abdominal pain are atypical clinical manifestations of Takayasu arteritis, and early imaging including carotid Doppler ultrasonography may aid in the establishment of diagnosis of Takayasu arteritis in children. [ABSTRACT FROM AUTHOR]