Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Ulcerative Colitis ?
    ### Response:
    A health care provider diagnoses ulcerative colitis with the following:
                
- medical and family history  - physical exam  - lab tests  - endoscopies of the large intestine
                
The health care provider may perform a series of medical tests to rule out other bowel disorders, such as irritable bowel syndrome, Crohn's disease, or celiac disease, that may cause symptoms similar to those of ulcerative colitis.
    