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🧪 What is Stool for Occult Blood?

The Stool for Occult Blood test detects hidden (occult) blood in the stool that is not visible to the naked eye. It is used to screen for gastrointestinal (GI) bleeding from various causes.

❓ Why is the Test Done?

To:

Screen for colorectal cancer or polyps
Detect bleeding from ulcers, gastritis, or inflammatory bowel disease
Investigate causes of iron deficiency anemia or unexplained GI symptoms
Monitor known GI diseases for bleeding

📊 Normal Results

Result	Interpretation
Negative	No detectable blood in stool
Positive	Presence of occult blood; further evaluation needed

📈 Interpretation of Results

Result	Clinical Implications
Positive occult blood	Suggests bleeding somewhere in the GI tract
False positives	Certain foods (red meat, some vegetables), medications (NSAIDs), or bleeding from oral/nasal sources
False negatives	Intermittent bleeding, improper sample collection

🧠 Associated Conditions

Condition	Details
Colorectal cancer	Early detection through screening
Peptic ulcer disease	Gastric or duodenal ulcers causing bleeding
Inflammatory bowel disease	Ulcerative colitis, Crohn’s disease
Hemorrhoids	Local anal bleeding

🔄 Related / Follow-Up Tests

Colonoscopy – definitive diagnosis of colorectal lesions
Upper GI endoscopy – evaluate upper GI bleeding sources
Complete blood count (CBC) – assess anemia
Iron studies – detect iron deficiency

✅ Fasting Required?

Test	Fasting Required
Stool for Occult Blood	❌ No

📝 Summary Table

Parameter	Details
What	Detects hidden blood in stool
Why	Screen for GI bleeding and colorectal cancer
Normal Result	Negative; no blood detected
Positive Result	Occult bleeding; requires further investigation
Associated Conditions	Colorectal cancer, ulcers, IBD, hemorrhoids
Follow-up Tests	Colonoscopy, endoscopy, CBC, iron studies
Fasting Required	❌ No

Stool for Occult Blood

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