1.a complete blood count is done to check for anemia,thrombocytosis,a high platelet count, is occasionally seen
2.eletrolyte studies and renal function tests are done,as chronic diarrhea may be associated with hypokalemia,hypomagnesemia and pre-renal failure.
3.live function tests are performed to screen for bile duct involment:primary sclerosing cholangitis.
4.X-ray
5.Urinalysis