5 doctors weighed in:
Can a doctor tell if you have colon cancer by taking test?
5 doctors weighed in

1 doctor agrees
In brief: Depends on type
Guaiac for blood in the stool can be a sign of colon cancer.
Colonoscopy is a screening study, where a polyp, tumor, or mass can be biopsied and a diagnosis given by a pathologist for colon cancer. Imaging studies may suggest a tumor also. There are many ways of screening for colon cancer (usually started after 50 years), depending on age and symptoms.

In brief: Depends on type
Guaiac for blood in the stool can be a sign of colon cancer.
Colonoscopy is a screening study, where a polyp, tumor, or mass can be biopsied and a diagnosis given by a pathologist for colon cancer. Imaging studies may suggest a tumor also. There are many ways of screening for colon cancer (usually started after 50 years), depending on age and symptoms.
Dr. Lester Thompson
Dr. Lester Thompson
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Dr. Tushar Patel
Radiology
1 doctor agrees
In brief: Colonoscopy
The best test to find colon cancer is colonoscopy, which is a fiber optic camera evaluation of the colon.
Blood tests such as cea levels are not used to screen (i.e. Check) for colon cancer in asymptomatic patients.

In brief: Colonoscopy
The best test to find colon cancer is colonoscopy, which is a fiber optic camera evaluation of the colon.
Blood tests such as cea levels are not used to screen (i.e. Check) for colon cancer in asymptomatic patients.
Dr. Tushar Patel
Dr. Tushar Patel
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Dr. Merry Jennifer Markham
Internal Medicine - Hematology & Oncology
In brief: A biopsy.
A colonoscopy is the best way to screen for colon cancer.
If there is anything suspicious seen on the colonopscopy, the doctor can take an immediate biopsy. The biopsy is sent to a pathologist who reviews the specimen and gives the diagnosis of colon cancer if it's there.

In brief: A biopsy.
A colonoscopy is the best way to screen for colon cancer.
If there is anything suspicious seen on the colonopscopy, the doctor can take an immediate biopsy. The biopsy is sent to a pathologist who reviews the specimen and gives the diagnosis of colon cancer if it's there.
Dr. Merry Jennifer Markham
Dr. Merry Jennifer Markham
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