case_images: PMC9939012_01
case_images: Computed tomography scan showing retroperitoneal fibrosis (red arrow).
case_images: cureus-0015-00000033998-i01.jpg
case_images: PMC9939012_01_cureus-0015-00000033998-i01.jpg
case_images: FIG1
case_images: A contrast-enhanced abdominal computed tomography (CT) was performed to look for acute pancreatitis, which showed stranding within the retroperitoneal fat extending throughout the abdomen and pelvis, including the perirectal and presacral regions (Figure 1).
case_images: Magnetic resonance imaging showing retroperitoneal fibrosis (red arrow).
case_images: cureus-0015-00000033998-i02.jpg
case_images: PMC9939012_01_cureus-0015-00000033998-i02.jpg
case_images: FIG2
case_images: But due to the non-resolution of the patient's pain and suspicion of underlying malignancy and biliary obstruction, a magnetic resonance imaging (MRI) accompanied by magnetic resonance cholangiopancreatography was performed which revealed retroperitoneal/periaortic fat stranding along the mesenteric vasculature with a noticeable gradual increase in multiple prior CTs in one year and multiple prominent cardio phrenic lymph nodes (Figure 2).