Term
Grade I
Tumor cells well differentiated |
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Definition
| ~Close resemblance to tissue of orgin and thus retaining some specialized functions |
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Term
Grade II
Tumor cells moderately or poorly differentiated |
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Definition
~Less resemblance to tissue of orgin
~More variation in xize and shape of tumor cells
~Increase mitoses |
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Term
Grade III
Tumor Cells poorly differentiated |
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Definition
~Increased abnormality in apperance with only remote resemblance to the tissue of origin
~Marked varition in shape and size of tumor cells
~Greatly increased mitoses |
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Term
Grade IV
Tumor cells very poorly differentiated |
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Definition
~Abnormal apperance to the extent that recongnition of the tumor's origin is difficult
~Extreme variation in size and shape of tumor cells |
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