A pathologist will examine a patient’s biopsy sample to determine the exact type of tumor, whether the tumor is it is benign or malignant and how serious it is (its grade).
Grade I tumor - Benign = non-cancerous
- Slow growing
- Cells look almost normal under a microscope
- Usually associated with long-term survival
Grade II tumor - Relatively slow growing
- Sometimes spreads to nearby normal tissue and comes back (recurs)
- Cells look slightly abnormal under a microscope
- Sometimes comes back as a higher grade tumor
Grade III tumor - Malignant = cancerous
- Actively reproduces abnormal cells
- Tumor spreads into nearby normal parts of the brain
- Cells look abnormal under a microscope
- Tends to come back, often as a higher grade tumor
Grade IV tumor - Most malignant
- Grows fast
- Easily spreads into nearby normal parts of the brain
- Actively reproduces abnormal cells
- Cells look very abnormal under a microscope
- Tumor forms new blood vessels to maintain rapid growth
- Tumors have areas of dead cells in their center
A pathologist will examine a patient’s biopsy sample to determine
the exact type of tumor, whether the tumor is it is benign or
malignant and how serious it is (its grade). Grade I tumor - Benign
= non-cancerous - Slow growing - Cells look...
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Johns Hopkins Medicine answered:A pathologist will examine a patient’s biopsy sample to determine the exact type of tumor, whether the tumor is it is benign or malignant and how serious it is (its grade).
