Colorectal cancer laboratory tests
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To view the laboratory findings of familial adenomatous polyposis (FAP), click here
To view the laboratory findings of hereditary nonpolyposis colorectal cancer (HNPCC), click here
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Saarah T. Alkhairy, M.D.
Overview
The laboratory tests that can be used for the diagnosis of colorectal carcinoma are the following: CBC, FOBT, serum CEA and CA 19-9 levels, serum iron levels, serum vitamin B12 and folate levels, liver function tests, and pulmonary function tests.
Colorectal Cancer Laboratory Findings
- Complete blood count and differential count - anemia
- Fecal occult blood test(FOBT) - demonstrates occult bleeding from the intestines
- Serum carcino-embryogenic antigen (CEA) and CA 19-9 - elevated levels have a poor prognosis
- Low serum iron levels
- Low serum vitamin B12 and folate levels
- Hypercalcemia (with metastasis to the bone)
Test for Metastasis
- Abnormal liver function tests
- Abnormal pulmonary function tests