case_images: PMC5585603_01
case_images: Preoperative computed tomography (CT) scan showing a right renal mass.
case_images: CRIS2017-9690218.001.jpg
case_images: PMC5585603_01_CRIS2017-9690218.001.jpg
case_images: fig1
case_images: We report the case of a 56-year-old Caucasian man presenting with a right renal mass (12 x 9 x 8 cm) revealed by CT (Figure 1) and MRI (Figure 2).
case_images: Preoperative magnetic resonance imaging (MRI) scan showing a right renal mass.
case_images: CRIS2017-9690218.002.jpg
case_images: PMC5585603_01_CRIS2017-9690218.002.jpg
case_images: fig2
case_images: We report the case of a 56-year-old Caucasian man presenting with a right renal mass (12 x 9 x 8 cm) revealed by CT (Figure 1) and MRI (Figure 2).
case_images: Histological findings. (a) Histological section of kidney parenchyma showing a chronic pyelonephritis characterized by the presence of interstitial fibrosis, inflammatory infiltrate of lymphocytes and plasma cells, and atrophy and dilatation of tubules that contain pink casts (hematoxylin-eosin (H-E), 10x). (b) The fibroadipose tissue of the kidney capsule typically shows the histological findings of IgG4-related disease, characterized by an irregularly whorled pattern of fibrosis (storiform fibrosis) associated with inflammatory infiltrate (H-E, 10x). (c) A vein obliterated by a transmural inflammatory cell infiltration (obliterative phlebitis) (H-E, 20x). (d) Immunostaining with anti-IgG4 antibody shows the presence of numerous positive cells (x20).
case_images: CRIS2017-9690218.003.jpg
case_images: PMC5585603_01_CRIS2017-9690218.003.jpg
case_images: fig3
case_images: T cells (CD20+, CD3+), as well as focal obliterative phlebitis. The IgG4+/IgG ratio was 70% (Figure 3).