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A prostate-specific antigen, or PSA, test is intended to measures the level of PSA in the blood. Prostate-specific antigen is a protein that is produced in the prostate gland. This test is carried out by a doctor when trying to diagnose the presence of cancer.


According to WebMD, PSA stands for prostate-specific antigen, a substance produced by the prostate gland. High levels suggest a risk of prostate cancer, and levels between 2.5 and 4 nanograms per milliliter of blood are usually considered normal.


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Resultant velocity is the vector sum of all given individual velocities. Velocity is a vector because it has both speed and direction. There are many ways to calculate vector sums, such as using a vector addition diagram, but using trigonometry to calculate vector components is usually more efficien


Most men have a prostate-specific antigen, or PSA, level of 4 and under, according to WebMD. This is the cutoff level for most doctors when determining prostate cancer risk. Men with prostate-specific antigen levels higher than 4 are more at risk of prostate cancer, though any man may develop it.


Abnormal levels of PSA, or prostate-specific antigen, generally do not exist, states the National Cancer Institute. Historically, PSA levels above 4.0 nanograms per milliliter often required a prostate biopsy to test for cancer, but studies show that prostate cancer can exist in patients with PSA le


An increase in protein-specific antigen (PSA) levels may be associated with many medical conditions that can affectthe prostate gland, such ascancer, benign prostatic hyperplasia, prostatitis and an infection. Another factor that alsomay raise the PSA level is the aging process, relates MedicineNet.


Most doctors consider prostate-specific antigen levels of up to 4.0 ng/mL in the blood as healthy, states the National Cancer Institute. The PSA test is one of the primary methods that doctors use to check for prostate cancer in men.


PSA tests are not always accurate, according to Mayo Clinic. PSA testing is often used to diagnose prostate cancer by identifying the level of prostate-specific antigens, or PSA, present in the bloodstream. However, as WebMD points out, this is a factor that cannot be reliably used to diagnose prost


In the past, a PSA of 6 may have indicated the presence of prostate cancer. However, according to the National Cancer Institute, new research indicates that healthy prostate function can produce a PSA of 6 or higher.