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Enzalutamide, sold under the brand name Xtandi, is a nonsteroidal antiandrogen (NSAA) medication which is used in the treatment of prostate cancer. [2] [9] It is indicated for use in conjunction with castration in the treatment of metastatic castration-resistant prostate cancer (mCRPC), [2] nonmetastatic castration-resistant prostate cancer, [2] and metastatic castration-sensitive prostate ...
The notion of doubling time dates to interest on loans in Babylonian mathematics. Clay tablets from circa 2000 BCE include the exercise "Given an interest rate of 1/60 per month (no compounding), come the doubling time." This yields an annual interest rate of 12/60 = 20%, and hence a doubling time of 100% growth/20% growth per year = 5 years.
After surgery or radiation therapy, PSA may start to rise again, which is called biochemical recurrence if a certain threshold is met in PSA levels (typically 0.1 or 0.2 ng/ml for surgery). At 10 years of follow-up after surgery, there is an overall risk of biochemical recurrence of 30–50%, depending on the initial risk state, and salvage ...
Cancer cases with localized tumors (T1 or T2), no spread (N0 and M0), Gleason grade group 1, and PSA less than 10 ng/mL are designated stage I. Those with localized tumors and PSA between 10 and 20 ng/mL are designated stage II – subdivided into IIA for Gleason grade group 1, IIB for grade group 2, and IIC for grade group 3 or 4.
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.
The formula above can be used for more than calculating the doubling time. If one wants to know the tripling time, for example, replace the constant 2 in the numerator with 3. As another example, if one wants to know the number of periods it takes for the initial value to rise by 50%, replace the constant 2 with 1.5.
cT1b: tumor was incidentally found in greater than 5% of prostate tissue resected; cT1c: tumor was found in a needle biopsy performed due to an elevated serum PSA; cT2: the tumor can be felt (palpated) on examination, but has not spread outside the prostate cT2a: the tumor is in half or less than half of one of the prostate gland's two lobes
Prostate-specific antigen. Prostate-specific antigen (PSA) is secreted by the epithelial cells of the prostate gland and can be detected in a sample of blood. [14] PSA is present in small quantities in the serum of men with healthy prostates, but is often elevated in the presence of prostate cancer or other prostate disorders. [15]
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