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The Gleason grading system is used to help evaluate the prognosis of men with prostate cancer using samples from a prostate biopsy. Together with other parameters, it is incorporated into a strategy of prostate cancer staging which predicts prognosis and helps guide therapy. A Gleason score is given to prostate cancer based upon its microscopic ...
Prostate cancer staging is the process by which physicians categorize the risk of cancer having spread beyond the prostate, or equivalently, the probability of being cured with local therapies such as surgery or radiation. Once patients are placed in prognostic categories, this information can contribute to the selection of an optimal approach ...
Surgical removal of the prostate, or prostatectomy, is a common treatment either for early-stage prostate cancer or for cancer that has failed to respond to radiation therapy. The most common type is radical retropubic prostatectomy , when the surgeon removes the prostate through an abdominal incision.
Prostate tumors were first described in the mid-19th century, during surgeries on men with urinary obstructions. Initially, prostatectomy was the primary treatment for prostate cancer. By the mid-20th century, radiation treatments and hormone therapies were developed to improve prostate cancer treatment.
There are several reasons why PIN is the most likely prostate cancer precursor. [3] PIN is more common in men with prostate cancer. High grade PIN can be found in 85 to 100% of radical prostatectomy specimens, [4] nearby or even in connection with prostate cancer. It tends to occur in the peripheral zone of the prostate.
Of the many cancer-specific schemes, the Gleason system, [3] named after Donald Floyd Gleason, used to grade the adenocarcinoma cells in prostate cancer is the most famous. This system uses a grading score ranging from 2 to 10. Lower Gleason scores describe well-differentiated less aggressive tumors.
Gleason remained at the Minneapolis VA Medical Center after World War II. In 1962, Dr. George Mellinger, the hospital's chief of urology, who was administering a cooperative research project involving fourteen hospitals, asked Gleason to develop a standardized pathological testing system to measure the development of prostate cancer. At the ...
In the central nervous system (CNS), glia suppress repair. Glial cells known as astrocytes enlarge and proliferate to form a scar and produce inhibitory molecules that inhibit regrowth of a damaged or severed axon. In the peripheral nervous system (PNS), glial cells known as Schwann cells (or also as neuri-lemmocytes) promote repair. After ...
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