A retroperitoneal soft tissue sarcoma can be staged after surgical resection based on a classification system used by researchers in Holland and the Memorial Sloan-Kettering Cancer Center.
Parameters:
(1) grade
(2) resection of the tumor
(3) metastases
Grade
Resection
Metastases
Stage
low grade
complete
none
I
high grade
complete
none
II
any
incomplete
none
III
any
any
present
IV
where:
• Low grade is Grade I out of III. High grade is Grade II or III out of III.
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