Retroperitoneum

Note 1: Comprehensive grading of soft tissue sarcomas is strongly correlated with disease specific survival and incorporates differentiation, mitotic rate, and extent of necrosis. The grading system of the French Federation of Cancer Centers Sarcoma Group (FNCLCC) is preferred system.
Note 2: Record the grade from any three-grade sarcoma grading system the pathologist uses prior to neoadjuvant treatment. Do not code terms such as "well differentiated" or "poorly differentiated" in this field.
Note 3: In some cases, especially for needle biopsies, grade may be specified only as "low grade" or "high grade". Use code 100, which maps to G1, or 200, which maps to G3. Codes 010-030 take priority over codes 100 and 200.
Note 4: The mapping of grade as shown in this table is used in the derivation of AJCC 7 staging.

Code	Description	Mapping of Grade
010	Specified as Grade 1 [of 3]	1
020	Specified as Grade 2 [of 3]	2
030	Specified as Grade 3 [of 3]	3
100	Grade stated as low grade, NOS	1
200	Grade stated as high grade, NOS	3
888	OBSOLETE DATA CONVERTED V0200 See code 988 Not applicable for this schema	ERROR
988	Not applicable: Information not collected for this case (May include cases converted from code 888 used in CSv1 for "Not applicable" or when the item was not collected. If this item is required to derive T, N, M, or any stage, use of code 988 may result in an error.)	9
998	No histologic examination of primary site	9
999	Unknown or no information Not documented in patient record	9

CS Site-Specific Factor 1Grade for Sarcomas