The most important complications of Crohn's disease

The most important complications of Crohn's disease are as follows:

1.Intestinal: Fistulas,strictures,abscesses,perianal disease,increased risk of adenocarcinoma

2.Skin: Erythema nodosum,pyoderma gangrenosum

3.Joints: Arthritis, ankylosing spondylitis

4.Eyes: Iritis,uveitis, episcleritis

5.Malabsorption: Oxalate kidney stones, anemia, hypoproteinemia, B12 and folate deficiencies ,gallstone

6.Liver: Primary sclerosing cholangitis ,increased risk of cholangiocarcinoma.