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Prostate-specific antigen (PSA), also known as gamma-seminoprotein or kallikrein-3 (KLK3), P-30 antigen, is a glycoprotein enzyme encoded in humans by the KLK3 gene.PSA is a member of the kallikrein-related peptidase family and is secreted by the epithelial cells of the prostate gland in men and the paraurethral glands in women.
Variations of the model are expressed in percent, e.g., "150% PSA" means a monthly increase of 0.3% in the annualized prepayment rate, until the peak of 9% is reached after 30 months. The months thereafter have a constant annualized prepayment rate of 9%. 1667% PSA is roughly equivalent to 100% prepayment rate in month 30 or later.
A PSA of 4 nanograms per milliliter (ng/mL) is typically the cutoff that doctors use to recommend more testing, according to the American Cancer Society. If your levels are between 4 ng/mL and 10 ...
Prostate biopsy is a procedure in which small hollow needle-core samples are removed from a man's prostate gland to be examined for the presence of prostate cancer.It is typically performed when the result from a PSA blood test is high. [1]
PSA levels between 4 and 10 suggest you could have about a 25 percent chance of prostate cancer, and levels over 10 signal that your chance of having the cancer is more than 50 percent.
The recommendation for that age group states screening should only be done in those who wish it. [18] In those 70 and over, screening remains not recommended. [18] Screening with PSA has been associated with a number of harms including over-diagnosis, increased prostate biopsy with associated harms, increased anxiety, and unneeded treatment. [19]
References range may vary with age, sex, race, pregnancy, [10] diet, use of prescribed or herbal drugs and stress. Reference ranges often depend on the analytical method used, for reasons such as inaccuracy , lack of standardisation , lack of certified reference material and differing antibody reactivity . [ 11 ]
The PSA era Prostate Cancer Intervention versus Observation Trial (PIVOT), compared radical prostatectomy to watchful waiting among 731 men (mean age 67 years) with localized prostate cancer. [10] At 12 years, a subset of men with a PSA above 10 ng/ml and those with intermediate to high risk disease had a reduction in prostate cancer death with ...
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