Tests and diagnosis

By 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.

Blood tests

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.

Nov. 27, 2012