Tests and diagnosisBy Mayo Clinic staff
There's no test that can specifically confirm a diagnosis of pyoderma gangrenosum. But your doctor may order a variety of tests to rule out other conditions that may have similar signs or symptoms.
A sample of your blood can be tested to check for:
- Evidence of infection
- Liver, kidney and thyroid function
- Rheumatoid factor, which indicates rheumatoid arthritis
Swabs and biopsies
A cotton swab can remove a small sample of liquid from the center of an ulcer to test for different types of infection. A skin biopsy involves removing a small sample of the affected skin, so it can be viewed under a microscope.
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- Gibson LE (expert opinion). Mayo Clinic, Rochester, Minn. Sept. 27, 2012.