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The calculation of the CA15-3 proteins is done by a simple blood test which involves the collection of blood sample and testing the sample separately using various techniques.

What is CA15-3?

CA15-3 (Cancer Antigen 15-3) are the normal protein cells produced by breast cells. These proteins move into the blood from where their range can be measured.

Why is CA15-3 suggested?

CA15-3 proteins are termed as tumour markers. The test is done to measure the range of CA15-3 proteins in the body.

It is used to check how the breast cancer treatment is working and also looks for cancer that has recurred after treatment.

How is CA15-3 performed?

A CA15-3 test is a normal blood test done with a needle.

The procedure for performing the CA15-3 blood test is as follows:

  • A band is wrapped around the arm so that the vein is clearly seen.
  • The area is cleaned with 70% alcohol to avoid infection.
  • A needle is inserted into the vein, and required amount of blood sample is collected.
  • The collected blood is transferred into a container, and the test is performed.

What are the parameters measured in CA15-3?

The parameters measured in the CA15-3 test are the range of the CA15-3 protein whose normal range is 30 U/mL .

An increase in the range may be an indication of a problem, and the decrease in range may be a sign of improvement in health and the effectiveness of the ongoing cancer treatment.

Preparation before performing CA15-3:

There are no special preparations needed before performing the CA15-3 test.

Post-care after CA15-3:

There are no post care measures as such after performing the CA15-3.

Sample types in CA15-3:

The increase in CA15-3 protein may be an indication of cancerous and non cancerous conditions:

  • Cancerous conditions may include indication of cancer of the lung, pancreas, ovary, and prostate.
  • Non cancerous conditions may include endometriosis, pelvic inflammatory disease, and liver disease.

Side effects/risks of CA15-3:

There are no side effects after performing the CA15-3 test.

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