Would a cbc blood test rule out all the chances of having cancer?
Did you find this post helpful?

replied October 15th, 2006
Unfortunately, No
Cbc will not rule out cancer, unfortunately. Abnormalities in a cbc are very good for detecting various diseases, but do not always rule disease out when the results are normal. It will give an indication of whether or not you have leukemia, however, as leukemia causes abnormal production of blood cells. If blood cells are in the normal range, then leukemia can be ruled out. A cbc might also help determine if someone has lymphoma as results may be abnormal, but normal results would not rule out lymphoma. Cancer is variable in whether or not it is easily detectable, depending on the type. Usually symptoms may lead a doctor to begin exploring a potential cause of cancer, but cancer may not always present symptoms until late in the stage of the disease, and many other problems can mimic the symptoms of cancers. It's always best to be mindful of what the symptoms are and have them checked out if they pop up. Often, a biopsy of the abnormal growth (if present) is the only way to tell if one has many types of cancer.
Did you find this post helpful?

User Profile
replied March 21st, 2019
Thank you for asking at Ehealth forum!

I read your question and I understand your concern.
CBC can rule out only blood cancers.
Solid organ cancers and lymphomas need special investigations.
I hope it helps. Stay in touch with your healthcare provider for further guidance as our answers are just for education and counselling purposes and cannot be an alternative to actual visit to a doctor.
Take care
Did you find this post helpful?
Quick Reply
Must Read
Millions of Americans are diagnosed with cancer. But what exactly is cancer and how does it affect the body?...
What puts you at risk for developing cancer? Learn how you can avoid or reduce exposure to risk factors for cancer here....
Cancer can occur anywhere in the body. But what are the signs and symptoms of cancer? Learn about general symptoms of cancer here....
DISCLAIMER: "Ask a Doctor" questions are answered by certified physicians and other medical professionals. For more information about experts participating in the "Ask a Doctor" Network, please visit our medical experts page. You may also visit our Cancers , for moderated patient to patient support and information.

The information provided on eHealth Forum is designed to improve, not replace, the relationship between a patient and his/her own physician. Personal consultation(s) with a qualified medical professional is the proper means for diagnosing any medical condition.