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Test Code FOBT Fecal Occult Blood, Colorectal Cancer Screen, Qualitative, Immunochemical, Feces

Reporting Name

Occult Blood, QL, Immunochemical, F

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

Colorectal cancer screening

 

Screening for gastrointestinal bleeding

 

This test has not been validated for testing of patients with hemoglobinopathies.

Method Name

Immunochemical


Ordering Guidance


This test will not detect upper gastrointestinal bleeding. If clinically indicated, order HQ / HemoQuant, Feces.



Specimen Required


Supplies: Fecal Occult Blood Test Kit (T682)

Container/Tube: Fecal Occult Blood Test Kit

Specimen Volume: Specimen must fill the grooved portion of the sample probe

Collection Instructions:

1. Collect a random stool specimen.

2. See Fecal Occult Blood Test Kit package insert for instructions.

3. Specimen must be collected in specific sample vial within 4 hours of defecation.


Specimen Type

Fecal

Specimen Minimum Volume

See Specimen Required

Specimen Stability Information

Specimen Type Temperature Time Special Container
Fecal Refrigerated (preferred) 30 days FOBT
  Ambient  15 days FOBT

Reject Due To

All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Reference Values

Negative

 

This test has not been validated in a pediatric population, results should be interpreted in the context of the patient's presentation.

Interpretation

This is a quantitative assay, but results are reported qualitatively as negative or positive for the presence of fecal occult blood; the cutoff for positivity is 100 ng/mL hemoglobin. The following comments will be reported with the qualitative result for patients older than 17 years:

-Positive results; further testing is recommended if clinically indicated. This test has 97% specificity for detection of lower gastrointestinal bleeding in colorectal cancer.

-Negative results; this test will not detect upper gastrointestinal bleeding; HQ / HemoQuant, Feces test should be ordered if clinically indicated.

Day(s) Performed

Monday through Saturday

Report Available

1 to 3 days

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

82274

G0328-Government payers (if appropriate)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
FOBT Occult Blood, QL, Immunochemical, F 29771-3

 

Result ID Test Result Name Result LOINC Value
FOB Occult Blood, Fecal 29771-3

Forms

If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:

-Oncology Test Request (T729)

-Gastroenterology and Hepatology Test Request (T728)