<prompt> Nongastrointestinal complications of Crohns disease include:Renal calculiCholelithiasisAhritisAll of the above  <response>: Although Crohns disease is primarily a disease involving the alimentary tract, involvement of extraintestinal tissues joints, skin, and eyes is common and indicates that Crohns disease is a systemic disorder rather than a localized intestinal disease. In addition to specific processes, secondary consequences of impaired intestinal absorption and resulting malnutrition include anemia due to specific deficits in vitamins, trace elements, and bile acids and electrolytes. Growth retardation and delayed bone maturation are present in 10-40 of children and adolescents with this disease. Patients with terminal ileal disease are also prone to develop renal urate or oxalate stones. Fuhermore, as the result of altered bile salt metabolism and the development of lithogenic bile, patients with ileal disease and ileal resections are also at risk for cholelithiasis. 