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Diagnostic Tests for Black stool

Diagnostic Test list for Black stool:

The list of diagnostic tests mentioned in various sources as used in the diagnosis of Black stool includes:

  • Physical examination
    • Look for signs of shock e.g. elevated heart rate, low blood pressure
    • Abdominal examination for tenderness , masses, enlarged liver or spleen
    • Examine for other evidence of chronic liver disease e.g. jaundice, bruising, enlarged breasts in males, scratch marks, swollen abdomen
    • Digital rectal examination inspecting the color of the stool and for blood
  • Blood tests
    • Hemoglobin level will not be an accurate guide to blood loss during early stages
    • Liver function tests looking for evidence of chronic liver disease
    • Bleeding disorder screen if there is a personal history and/or family history of bleeding e.g. Coagulation studies , platelet count, hemophilia testing, platelet aggregation and release studies
    • Carcinoembryonic antigen (CEA) elevated in 65% of stomach cancers
  • Other tests
    • Stool tests - looking for occult blood to help confirm presence of true melena.
    • Microscopy looking for ova, cysts, parasites of Hookworm
    • Upper and lower endoscopy - looking for the source of the bleeding, biopsy to exclude cancer and to detect Helicobacter pylori (bacteria shown to increase the risk of peptic ulcer disease).
  • Radiology investigation
    • Radioactive scan following intravenous chromium or technetium-99 - may show the site of bleeding in obscure cases.

Home Diagnostic Testing

These home medical tests may be relevant to Black stool causes:

Conditions listing medical symptoms: Black stool:

The following list of conditions have 'Black stool' or similar listed as a symptom in our database. This computer-generated list may be inaccurate or incomplete. Always seek prompt professional medical advice about the cause of any symptom.

Select from the following alphabetical view of conditions which include a symptom of Black stool or choose View All.

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