تب با منشاء ناشناخته در کودکان تهرانی

Background and purpose: Fever of unknown origin is a frequent disorder in pediatric age. The aim of this study was to determine the causes of fever of unknown origin and to evaluate diagnostic tests. Materials and Methods: Çases were identified by reviewing the medical records of all patients with FÜÔ which were admitted in three medical centers in Tehran during march 1994- 99. Results: Ïnfection was the most frequent cause of fever of unknown origin. Neoplastic disorders occurred in children older than one year. Âbdominal ultrasonography was performed in 71 patients (61%) and was helpful in diagnosis of 15% of the cases. Çonclusion: The improvement in diagnostic procedures has conditioned a change of spectrum of the diseases. Ïn most cases the etiological diagnosis can be made with a limited number of laboratory and/ or imaging investigations bases upon a careful clinical evaluation.