TNM 7 Stage Group

This input is used for staging

Notes

**Note 1:** SEER*RSA added additional information to UICC 7th edition stages with UICC approval. If your registry submits the directly assigned Stage Groups to agencies other than SEER, please check the AJCC 7th edition manual to ensure you are using the appropriate logic. * Stage Group IV (as defined in the table) **Note 2:** While the stage groups below are valid, the specified TNM combinations are only included in SEER*RSA. * Stage Group IIA - T1, NX, M0 (Grade 3,4) - NX is not included in the stage group definition * Stage Group IIB - T2, NX, M0 (Grade 3,4) - NX is not included in the stage group definition * Stage Group III - T3, NX, M0 (Grade 3, 4) - NX is not included in the stage group definition * Stage Group IVA - Any T, NX, M1a, Any Grade - NX is not included in the stage group definition **Note 3:** While the stage group below is valid, the specified TNM combination is only included in SEER*RSA for non-Ewing histologies. * Stage Group IA - T1, NX, M0, Grade (1, 2, 9) - NX is not included in the stage group definition * Stage Group IB - (T2, T3), NX, M0, Grade (1, 2, 9) - NX is not included in the stage group definition **Note 4:** Ewing sarcoma (ICD-O-3 Histology 9260, 9364) is always classified as High Grade (3 or 4). Ewing sarcoma should NOT be assigned Stage group IA or IB.

Default

NAACCR Item

NAACCR #970

Metadata

None

Stage	Stage Display	T	N	M	Grade	Histology
1A	IA	T1	N0,X	M0	1,2,9	NOT 9260, 9364 (Not Ewing)
1B	IB	T2,3	N0,X	M0	1,2,9	NOT 9260, 9364 (Not Ewing)
2A	IIA	T1	N0,X	M0	3,4	Any Histology
2B	IIB	T2	N0,X	M0	3,4	Any Histology
3	III	T3	N0,X	M0	3,4	Any Histology
4	IV	Any T	N0,X	M1	Any Grade	Any Histology
4A	IVA	Any T	N0,X	M1a	Any Grade	Any Histology
4B	IVB	Any T Any T	N1 Any N	M0,1,1a M1b	Any Grade Any Grade	Any Histology Any Histology
99	Unknown	TX	N0,X	M0	Any Grade	Any Histology
88	Not Applicable	88	88	88	Any Grade	Any Histology