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The rate of death from prostate cancer at 10 years for men age 65–74 years with moderately differentiated cancers (Gleason score 5–7) diagnosed with screening (in the prostate cancer screening era) and pre prostate cancer screening eras (without screening) were from 2-6%, and from 15 to 23%, respectively.
Prostate cancer screening is the screening process used to detect undiagnosed prostate cancer in men without signs or symptoms. [ 1 ] [ 2 ] When abnormal prostate tissue or cancer is found early, it may be easier to treat and cure, but it is unclear if early detection reduces mortality rates.
The majority of drugs used in cancer chemotherapy are cytostatic, many via cytotoxicity. A fundamental philosophy of medical oncology , including combination chemotherapy, is that different drugs work through different mechanisms, and that the results of using multiple drugs will be synergistic to some extent.
The consequences of overdiagnosis and overtreatment resulting from cancer screening can lead to a decline in quality of life, due to the adverse effects of unnecessary medication and hospitalization. [10] [12] [13] The accuracy of a cancer screening test relies on its sensitivity, and low sensitivity screening tests can overlook cancers. [10]
In men aged 55–69 who have been counseled on the known harms and potential benefits of prostate cancer screening, the U.S. Preventive Service Task Force May 2018 statement states, "The use of digital rectal examination as a screening modality is not recommended because there is a lack of evidence on the benefits."
Nausea and vomiting are two of the most feared cancer treatment-related side-effects for people with cancer and their families. In 1983, Coates et al. found that people receiving chemotherapy ranked nausea and vomiting as the first and second most severe side-effects, respectively. [98]
A 2024 systematic review of the literature found that chemoradiation with 5-FU and mitomycin C, as used in the Nigro Protocol, improves outcomes like colostomy-free survival in anal cancer patients compared to alternatives like cisplatin. However, it can lead to more severe side effects, especially blood-related toxicity. [7]
Several types of screening exist: universal screening involves screening of all individuals in a certain category (for example, all children of a certain age). Case finding involves screening a smaller group of people based on the presence of risk factors (for example, because a family member has been diagnosed with a hereditary disease).