Meaning of PROSTATE SPECIFIC ANTIGEN

WordNet Dictionary
	Definition:		[n]  a protein manufactured exclusively by the prostate gland; PSA is produced for the ejaculate where it liquifies the semen and allows sperm cells to swim freely; elevated levels of PSA in blood serum are associated with benign prostatic hyperplasia and prostate cancer
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	Synonyms:		PSA
	See Also:		protein
Medical Dictionary
	Definition:		an antigen made by the prostate gland and found in the blood; may indicate cancer in the prostate gland. A protein that is elevated in some patients with prostate cancer.
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Biology Dictionary
	Definition:		This is a glycoprotein found in the cytoplasm of epithelial cells of prostate (a gland in the base of the penis). Its level in the blood may be elevated in men who have a benign or a malignant growth in the prostate. For this reason, the PSA test does not always distinguish between benign prostate conditions (which are very common in older men) and cancer. However, its level is useful as a screening test for early detection and to monitor the effectiveness of prostate cancer treatment over time. Normal range: less than 4 ng/mL A protein which is produced by the prostate gland. A test to determine its levels in the blood is often used to determine whether a man might have prostate cancer or not.
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