Chronic Diarrhea: Diagnosis & Tests Menu

How Is Chronic Diarrhea Diagnosed?

90% of those with chronic diarrhea will have the cause diagnosed. A history of the timing and consistency of stool, as well as travel history and family history aid diagnosis.

Blood Tests Useful in Chronic Diarrhea

  • Complete Blood Count: Will diagnose anemia and will indicate infection from the white blood cell (WBC) count
  • Serum electrolytes: Sodium, potassium, chloride, calcium, etc
  • Inflammatory Markers: Erythrocyte sedimentation rate (ESR), C-reactive protein (CRP)
  • Functional assessment: Via total protein and albumin and thyroid function tests
  • Serologic testing for celiac disease

Stool Test Useful in Chronic Diarrhea:

  • Evaluation for occult blood
  • Microscopic exam for parasites
  • Stool cultures

Endoscopic Evaluation:

  • Sigmoidoscopy or Colonoscopy (preferred) with possible biopsies

Diagnostic Imaging:

  • X-rays, abdominal CT, and/or MRI

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This information is provided by Vascular Health Clinics and is not intended to replace the medical advice of your doctor or healthcare provider. Please consult your healthcare provider for advice about a specific medical condition.

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