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The most differentiated tumor would have the lowest score, Gleason 2 (1+1), while the most undifferentiated neoplasm (not resembling native prostate tissue) would have the highest score, Gleason 10 (5+5). Gleason scores range from 2 to 10; by definition there is no score of 0 or 1. [4] [7]
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.
For prostate cancer, cell morphology is graded based on the Gleason grading system. [citation needed] Of note, this system of describing tumors as "well-", "moderately-", and "poorly-" differentiated based on Gleason score of 2–4, 5–6, and 7–10, respectively, persists in SEER and other databases but is generally outdated. In recent years ...
The lowest possible Gleason score of 6 represents a biopsy most similar to healthy prostate; the highest Gleason score of 10 represents the most severely cancerous. [note 1] Gleason scores are commonly grouped into "Gleason grade groups", which predict disease prognosis: a Gleason score of 6 is Gleason grade group 1 (best prognosis). A score of ...
The histopathologic subdiagnosis of prostate cancer has implications for the possibility and methodology of any subsequent Gleason scoring. [1] The most common histopathological subdiagnosis of prostate cancer is acinar adenocarcinoma, constituting 93% of prostate cancers. [ 2 ]
The lowest possible Gleason score is 2 (1 + 1), where both the primary and secondary patterns have a Gleason grade of 1 and therefore when added together their combined sum is 2. 2. Very typical Gleason scores might be 5 (2 + 3), where the primary pattern has a Gleason grade of 2 and the secondary pattern has a grade of 3, or 6 (3 + 3), a pure ...
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