Ovarian CancerTumor Grade |
Physician-developed and -monitored. Original Date of Publication: 15 Aug 1999
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Original Source: http://www.oncologychannel.com/ovariancancer/tumor-grade.shtml | |
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Home » Ovarian Cancer » Tumor Grade | 
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Tumor grade generally refers to the degree of differentiation—or maturity—of the cells that make up the tumor within the ovary. Yet, worldwide, there are many different systems for the grading of ovarian cancers, without a common standard.
Most investigators use criteria such as the architectural "pattern" of the cells and their nuclear content (e.g., DNA "ploidy," or how many pairs of chromosomes are present), although additional factors may be considered, such as the tumor's margin, invasion of the blood vessels, and penetration of the ovarian capsule (surface).
Most epithelial cancers are categorized by three grades of cells:
| Grade 1: | the least malignant, with well-differentiated cells |
| Grade 2: | intermediate, with moderately differentiated cells |
| Grade 3: | the most malignant, with poorly differentiated cells |
Overall, low-grade (e.g., Grade 1) tumors grow more slowly and have a better prognosis than high-grade tumors.
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