Tests and diagnosisBy Mayo Clinic staff
Tests and procedures used to diagnose proctitis include:
- Blood tests to detect blood loss or infections.
- Stool test. You may be asked to collect a stool sample for testing. A stool test may help determine if your proctitis is caused by a bacterial infection.
- Scope exam of the final portion of your colon. During a flexible sigmoidoscopy, your doctor uses a slender, flexible, lighted tube to examine the sigmoid, the last part of your colon — including the rectum. During the procedure, your doctor can also take small samples of tissue (biopsy) for laboratory analysis. Sometimes a tissue sample can help confirm a diagnosis.
- Scope exam of your entire colon. A colonoscopy allows your doctor to view your entire colon using a thin, flexible, lighted tube with an attached camera. Your doctor can also take a biopsy during this test.
- Testing for sexually transmitted infections. This involves obtaining a sample of discharge from your rectum or from the tube (urethra) that drains urine from your bladder or from your rectum. If the cause of your proctitis is likely to be an STI your doctor may insert a narrow swab into the end of your urethra or anus to obtain the sample, which is then tested for the presence of bacteria or other infectious organisms. The results can be used to select the most effective treatment.
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