title: Renal lesions in autoimmune pancreatitis: diffusion weighted magnetic resonance imaging for assessing response to corticosteroid therapy.
abstract: BACKGROUND
  Autoimmune pancreatitis is a rare disorder characterized by the systemic deposition of IgG4 plasma cells. Extrapancreatic manifestations of autoimmune pancreatitis depend on the site of plasma cell deposition. The most common extrapancreatic site of involvement is the bile duct followed by the retroperitoneum and kidneys.
  
  
  METHODS
  We report a case of a patient with autoimmune pancreatitis and renal lesions who underwent MRI prior to and after corticosteroid therapy.
  
  
  CONCLUSIONS
  We emphasize the role of diffusion weighted imaging (DWI) and apparent diffusion coefficient (ADC) findings on MRI in evaluating the response to steroid therapy.
authors.affiliation: Russell H Morgan Department of Radiology and Radiological Science, Johns Hopkins Medical Institutions. Baltimore, MD, USA. azaheer1@jhmi.edu.
authors.forename: Atif
authors.initials: A
authors.lastname: Zaheer
authors.forename: Vivek Gowdra
authors.initials: VG
authors.lastname: Halappa
authors.forename: Venkata S
authors.initials: VS
authors.lastname: Akshintala
authors.forename: Vikesh K
authors.initials: VK
authors.lastname: Singh
authors.forename: Ihab R
authors.initials: IR
authors.lastname: Kamel
mesh_terms: D001327:Autoimmune Diseases / Q000097:blood / Q000175:diagnosis* / Q000188:drug therapy; D038524:Diffusion Magnetic Resonance Imaging / Q000379:methods; D005938:Glucocorticoids / Q000627:therapeutic use; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D007668:Kidney / Q000187:drug effects / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D010195:Pancreatitis / Q000097:blood / Q000175:diagnosis* / Q000188:drug therapy; D011241:Prednisone / Q000627:therapeutic use; D016896:Treatment Outcome
chemical_list: D005938:Glucocorticoids; D007074:Immunoglobulin G; D011241:Prednisone