Proximal Type Epithelioid Sarcoma
Proximal Type Epithelioid Sarcoma
Grading
According to the guidelines of the ADASP, epithelioid sarcoma is not graded but often metastasizes
French Federation of Cancer Centers System grading scheme for adult sarcomas
- Tumor differentiation score = 3 for epithelioid sarcoma
- Mitotic index
- Score 1 0-9 mitoses per 10 hpf (0.1744 sq mm)
- Score 2 10-19 mitoses per 10 hpf
- Score 3 >19 mitoses per 10 hpf
- Tumor cell necrosis
- Score 0 No necrosis on any slide (one slide per 2 cm tumor diameter)
- Score 1 <50% of tumor is necrotic on slides examined
- Score 2 >50% of tumor is necrotic on slides examined
- Final Grade (add the three scores above)
- Grade 1 Sum of scores = 2 or 3
- Grade 2 Sum of scores = 4 or 5
- Grade 3 Sum of scores = 6 or more
