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PSA was launched in July 1991 by David Hall, owner of the coin grading company Professional Coin Grading Service (PCGS), to serve collectors as a third-party card grader. [1] At the outset, the business faced difficulties owing to a limited demand from collectors who sought card grading services. [2]
For example, if the most prevalent pattern/grade is 2, and the second most prevalent grade is 1, then the Gleason score is 2+1=3. If the neoplasm has only one pattern, the grade of that pattern is doubled to obtain the score. For example, if a tumor is entirely grade 1, the Gleason score would be 1+1=2.
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.
In simpler terms, it serves as a set of criteria for grading assignments. Typically presented in table format, rubrics contain evaluative criteria, quality definitions for various levels of achievement, and a scoring strategy. [1] They play a dual role for teachers in marking assignments and for students in planning their work. [2]
[10] PI-RADS v2 is designed to improve detection, characterization and risk stratification in patients suspected of prostate cancer with a goal of better treatment decisions, improved outcomes and simplified reporting. However, multi-center validation trials are needed and expected to lead to modifications in the scoring system. [11]
About the Poll The Washington Poll is a non-partisan, academic survey research project sponsored by the Washington Institute for the Study of Ethnicity, Race & Sexuality (WISER), a research center at the University of Washington in the
This stems from the practice that exams were traditionally given by 3 examiners. Each had to rate the student's examination performance on a 1–10 scale, and the final grade was the sum of the three ratings. On a 1–10 scale, passing is 6, so on a 1–30 scale the minimum passing grade is 3*6 = 18.
Thousands of fans streamed into Great American Ball Park despite steady rain on Sunday to pay respects to Pete Rose, baseball's career hits leader, who died Sept. 30 at the age of 83. The 14-hour ...