Retroperitoneal fibrosis (RPF) is a rare disease, characterized by inflammation and deposition of fibrotic tissue in the vicinity of the abdominal aorta and iliac arteries. We present a report of five patients admitted to our department between January 2014 and February 2017, diagnosed with RPF. Abdominal pain was the most common presenting symptom; however, in one patient, RPF was identified accidentally in routinely performed ultrasonography. In 4 cases, corticosteroids (CS) in combination with azathioprine were applied as first-line therapy, whereas one patient was treated with intravenous methylprednisolone pulses followed by oral CS. In this paper, clinical features as well as laboratory and radiographic findings together with management and treatment outcomes in patients with RPF are discussed. Given the rarity of the condition, it seems important to report every single case of RPF to help establish its management algorithm.