The Role of Multidetector CT in the Diagnosis of Retroperitoneal Fibrosis: Report of a Case

Herein, we report a 40-year old man who presented with flank and abdominal pain with dilatation of the bilateral pyelocalyceal system detected in ultrasonography. computed tomography (ct) scan showed a soft tissue mass at the level of the fourth and fifth lum- bar vertebrae in the retroperitoneal region. there were no blood flow signals in 64-slice multidetector ct (mdct) which confirms the retroperitoneal fibrosis (rpf). pathologi- cal examination showed infiltration of plasma cells, macrophages, lymphocytes and eosinophils accompanied by fibrosis, which is consistent with idiopathic rpf. in conclu- sion, 64-slice mdct imaging is useful in the diagnosis of rpf.