Diagnosis may involve a combination of the following tests and examinations.1,2
Blood Tests
May be performed to check for anaemia, which may indicate bleeding in the intestines. Blood tests may also uncover a high white blood cell count, which is a sign of inflammation somewhere in the body.1,2
Faecal Tests
By testing a stool (faecal) sample, clinicians can tell if there is bleeding or infection in the intestines. Stool tests are commonly done to rule out other diseases of the GI tract, such as cancer.1,2
Imaging Tests
Magnetic resonance imaging (MRI) or computed tomography (CT) may be used to identify visible abnormalities in the gut.2,4
Flexible sigmoidoscopy and colonoscopy
These tests are performed using a long, flexible tube that has a small video camera on the end. A doctor can carefully examine the rectum, colon and small intestine for inflammation, bleeding, or ulcers, or may perform a biopsy. The tissue taken during a biopsy can be analysed microscopically to confirm a diagnosis.1,2