Should the physical exam not produce a definitive diagnosis, the doctor may want to conduct more tests to determine the cause of the pain. A blood test can establish a high white blood cell count, which may indicate infection. The doctor may have the patient undergo a urine test to rule out a urinary tract infection or kidney stone. The doctor may perform various imaging tests to confirm appendicitis, including an abdominal x-ray, an abdominal ultrasound, or a computerized tomography (CT) scan.

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