Crohn’s Disease

  • Etiology: idiopathic inflammatory bowel disease
  • Imaging: transmural bowel inflammation affecting anywhere in GI tract but terminal ileum is classic, skip lesions
  • CT + MRI signs of active disease: mucosal hyperenhancement, wall thickening, prominent vasa recta (comb sign), mesenteric infiltration of fat, hypoperistalsis, restricted diffusion
  • Complications: stricturing of small bowel, penetrating fistula + abscess formation, sacroiliitis, primary sclerosing cholangitis, avascular necrosis, pancreatitis, nephrolithiasis, cholelithiasis

Cases of Crohn’s Disease