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Multiparametric magnetic resonance imaging of the prostate (mpmrip) is a promising tool for. Multiparametric magnetic resonance imaging of the prostate (mpmrip) is a promising tool for diagnosing prostate cancer, and prior to its availability, detection relied on. Prostate-specific antigen (psa), also known as gamma-seminoprotein or kallikrein-3 (klk3), 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. Prostate-specific antigen, or psa, is a protein produced by normal, as well as malignant, cells of the prostate gland. For this test, a blood sample is sent to a laboratory for analysis. Prostate specific antigen or psa, is an enzyme found in a mans blood produced exclusively by prostate cells. Normal psa levels in the blood are very small amounts between 0-2. As a man ages his prostate can become larger, leading to slightly higher normal levels of psa. what is a prostate specific antigen (psa) test? A psa test is a blood test used to screen men for prostate cancer. A psa test is also used to monitor how well prostate cancer treatment is working. The psa test can be useful for detecting prostate cancer, monitoring its treatment, or assessing its recurrence. The psa test can also be abnormal with benign enlargement (benign prostatic hyperplasia or bph), inflammation or infection of the prostate gland (prostatitis), urinary tract infection, following catheterization or. prostate specific antigen prostate cancer is one of the most difficult to discover early since it has few if any symptoms in the early stages. This form of cancer tends to be less dangerous than many other types. Mostly because it is located away from most of the organs in the body and the thickness of the tissues makes it difficult to expand rapidly. prostate-specific antigen (psa) is a 33-kd protein consisting of a single-chain glycoprotein of 237 amino acid residues, 4 carbohydrate side chains, and multiple disulfide bonds. It is homologous with the proteases of the kallikrein family. Psa may be referred to as human glandular kallikrein (hk)-3 to distinguish it from hk-2, another prostate. Serum prostate specific antigen was determined (yang polyclonal radioimmunoassay) in 183 men after radiation therapy for adenocarcinoma of the prostate. A total of 163 men had received 7,000 rad external beam radiotherapy and 20 had been implanted with 125iodine seeds. urology relationship of demographic and clinical factors to free and total prostate-specific antigen, freetotal psa ratio is a powerful predictor of future prostate cancer morbidity in.