what does a cancer marker of 13 mean

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My tumour marker with 1mm breast cancer invasion was 9.3. After mastectomy it is still 9.3. Does that mean it wasnt actually cancer?

No

Breast_cancer
Breast cancer is diagnosed with a microscope, not a blood test. Your tumor marker being normal before and after surgery tells me nothing at all. People may have cancer and their marker can be normal or have an elevated marker without having cancer. Best of luck to you.
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Dr. Tarik Hadid answered:

If your tumor marker is greater than 0 but less than 40 (around 20-26) does it mean you still have Cancer and Chemo didn't get it all?

No..

Marker
It depends on what tumor marker you are referring to. In most cancers, tumor markers are never 0 even in healthy individuals that never had cancer. What is more important than the number is the trend in the values. So if within the last 6 months the number are 20, 60, 130, 220, then it is reason to be concerned. Otherwise, it should be followed serially.
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Dr. Kenneth Smith answered:

Colon cancer stage 3b but after surgery cea level dropped from 13 to 1.8 what does it mean?

Tumor markers

Colon
CEA is a tumor marker it does not occur with all colon cancers but the fact that it dropped so abruptly is a positive sign. The marker has the ability to be used to monitor for recurrence. This does by no means Indicates you are done. There are a number of treatments for colon cancer and you should recruit the serviceces of a board certified medical oncologist for an opinion on tx options
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My tsh level was 0.215 on 12/17/13 and was 0.584 on 5/21/13. I've been taking my meds the same. Could this mean my thyroid cancer has returned?

No, don't worry!

Thyroid_gland
TSH is not made by thryoid cancer! It's made by your body to stimulate your thyroid to produce hormones. TSH can stimulate thyroid cancer cells, too, so the medicine you take is to keep your TSH level as low as possible. The fact that your TSH has risen might be a sign that you need to take a higher dose of your medication. This is something you should ask your doctor about!
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Dr. Kevin Scher answered:

What are tumor markers, and does having them mean that I have cancer?

Blood tests

Tumor_marker
Tumor markers are blood tests that are sometimes used to follow progression of cancer once it has already been diagnosed. We rarely, if ever, use tumor makers to make a cancer diagnosis. There are many other reasons why these markers may be elevated including inflammation, infection, etc.
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What does tumour markers (for testicular cancer)mean? Does the cancer have to be wide spread before it shows in the blood?

No

Tumor_marker
There are three different tumor markers that can be elevated in different types of testicular cancer: beta HCG, AFP, and LDH. They can be elevated even when the cancer is ONLY in the testicle and hasn't spread anywhere else in the body. On the other hand, it is also possible to have metastases without elevated markers because some types often don't make any marker at all (eg pure seminoma).
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What are "Markers" and what does it mean to a breast cancer patient with stage 4, metastatic cancer, when her markers go from 4,700 down to 53?

Tumor marker

Breast_cancer
You must be referring to a particular tumor marker! tumor markers are used to track the progress of certain cancers. if your number has gone down to that level it means the modality of treating your brest cancer has been very effective! It does not necessarily mean you are in remission, all it means is that your breast cancer has responded very well to the treatment you have received!
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Dr. Ed Friedlander answered:

Can elevated CA15-3 mean something other than breast cancer? Clear mammo but CA15-3 results - 31.6 (CA markers done as part of complete physical)

Stop worrying

Marker
The reference range is set so that 5% of folks believed to be healthy fall above it. Usually the top of the reference range is 30 or so. This alone should make you stop worrying. Further, fairly high values are often observed with no obvious explanation. Why was it run in the first place? Mild elevations usually just generate confusion and upset people and never detect anything.
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what is the cancer marker lab test CEA something?

Colon cancer marker

Colon_cancer
The CEA (Carcinoembryonic Antigen) test is a colon cancer tumor marker. As with most tumor markers, it is NOT used as a screening test for colon cancer (in other words, it is not used to find the cancer because of a relatively high false positive rate) but it is used to monitor the cancer once it has been diagnosed. This is particularly useful for treated colon cancer to see if the tumor reoccurs.
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Dr. Gurmukh Singh answered:

Does low levels of tumor marker indicate no more cancer?

Not necessarily

Cancer
Tumor makers are good for monitoring the response to treatment. Low or better yet, absent levels may mean that tumor is not there, however, more often it indicates a remission and levels increase if there is a recurrence. Therefore low levels of tumor markers do not always mean "no more cancer".
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