Urología Marbella
Urología Marbella

PSA analysis

PSA is determined from a sample of blood, and it can be used in different ways:

 

In men when it is not known whether they suffer from prostate cancer, as a screening or diagnostic test.

 

In men already diagnosed with prostate cancer, as a specific marker or monitoring procedure.

 

 

What is PSA?

PSA (prostate-specific antigen), a protein that liquefies semen, is secreted by prostate and used as a tumour marker.

 

This substance is found only in the prostate and only in men, and it is a tumour marker in men starting at age 50, when a certain amount of this protein is present in the bloodstream.

 

 

Types of PSA

PSA can be found in blood a free form, or bound to other blood substances.

 

When in the free form, it is known as free PSA.

 

▪ When bound to other substances, it is known as complexed PSA.

▪ The total PSA is the sum of both forms of PSA, which is regularly determined in blood tests.

 

When PSA determination is used as a screening or diagnostic test, if an abnormal result is observed then additional tests will be required. Increased levels of PSA may suggest the presence of prostate cancer.

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