case_images: PMC7374222_01
case_images: CT scan abdomen. (a) Initial and (b) follow-up scan 1 year later after discontinuation of etanercept, without systemic steroids.
case_images: CRIRH2020-8899658.001.jpg
case_images: PMC7374222_01_CRIRH2020-8899658.001.jpg
case_images: fig1
case_images: A computed tomography (CT) scan revealed diffuse hyperattenuation throughout the retroperitoneum and mesentery and bilateral mild hydronephrosis, with dilated ureters proximally thought to be due to retroperitoneal fibrosis (Figure 1). Despite this, one year later, his CT scan showed marked improvement in the retroperitoneal mass (Figure 1).
case_images: Histopathology of the mass: mesenteric inflammation with fibrosis and lipodystrophy (staining: hematoxylin-eosin; magnification: 20x).
case_images: CRIRH2020-8899658.002.jpg
case_images: PMC7374222_01_CRIRH2020-8899658.002.jpg
case_images: fig2
case_images: A laparoscopic biopsy was performed, which showed nonspecific inflammatory changes without granuloma or neoplastic cells (Figure 2).