CS Mets at DX

Notes

**Note 1**: Distant lymph node involvement is considered N2 for AJCC 7 staging for retinoblastoma and is coded in the CS Lymph Nodes field. Distant lymph node involvement was considered M1 in AJCC 6 staging for retinoblastoma and was coded in CS Mets at DX in CS Version 1. **Note 2**: Code single and multiple metastatic lesions in this field based on the presentation of metastases in all distant sites excluding distant lymph nodes. **Note 3**: Consider metastasis to bone marrow as a single site of involvement.

Code	Description	AJCC 7 M	AJCC 6 M	Summary Stage 1977 M	Summary Stage 2000 M
00	No distant metastasis	M0	Determine Correct Table for AJCC 6 M	NONE	NONE
10	OBSOLETE DATA RETAINED V0200 Distant lymph nodes coded in CS Lymph Nodes Distant lymph node(s)	ERROR:	Determine Correct Table for AJCC 6 M	D	D
20	Single metastatic lesion only: Distant metastasis to site other than bone marrow or CNS	M1a	Determine Correct Table for AJCC 6 M	D	D
30	Single metastatic lesion only: Distant metastasis to bone marrow only	M1a	Determine Correct Table for AJCC 6 M	D	D
35	Distant metastasis to single lesion, NOS Stated as M1a with no other information on metastasis	M1a	Determine Correct Table for AJCC 6 M	D	D
40	OBSOLETE DATA CONVERTED V0200 See code 80 Distant metastasis except distant lymph node(s) (10) or bone marrow (30) Distant metastasis, NOS Carcinomatosis	ERROR:	ERROR:	ERROR:	ERROR:
45	Multiple metastatic lesions involved Distant metastasis to sites other than CNS WITH or WITHOUT bone marrow involvement Stated as M1b with no other information on metastasis	M1b	Determine Correct Table for AJCC 6 M	D	D
50	OBSOLETE DATA RETAINED V0200 Distant lymph nodes coded in CS Lymph Nodes (10) + any of [(30) or (40)] Distant lymph node(s) plus other distant metastases	ERROR:	Determine Correct Table for AJCC 6 M	D	D
55	OBSOLETE DATA CONVERTED V0200 See code 80 Stated as M1, NOS	ERROR:	ERROR:	ERROR:	ERROR:
60	Metastasis to CNS: Location not specified Stated as M1c with no other information on metastasis	M1c	Determine Correct Table for AJCC 6 M	D	D
65	Metastasis to CNS: Prechiasmatic lesions WITHOUT leptomeningeal and/or CSF involvement	Mets at DX Mets Eval AJCC7	Determine Correct Table for AJCC 6 M	D	D
70	Metastasis to CNS: Postchiasmatic lesions WITHOUT leptomeningeal and/or CSF involvement Stated as M1d with no other information on metastasis	M1d	Determine Correct Table for AJCC 6 M	D	D
75	Metastasis to CNS: WITH Leptomeningeal and/or CSF involvement Stated as M1e with no other information on metastasis	M1e	Determine Correct Table for AJCC 6 M	D	D
80	Distant metastasis, NOS Stated as M1, NOS with no other information on distant metastasis	M1NOS	Determine Correct Table for AJCC 6 M	D	D
99	Unknown; distant metastasis not stated Distant metastasis cannot be assessed Not documented in patient record	M0	Determine Correct Table for AJCC 6 M	U	U

- For CS Mets at DX code 65 ONLY, the M category for AJCC 7 staging is assigned based on the values of CS Mets at DX and CS Mets Eval, as shown in the Mets at DX Mets Eval AJCC 7 Table for this schema. - For CS Mets at DX codes 00 through 99, when CS Lymph Nodes code is only 000, 100, 800, or 999, the M category for AJCC 6 staging is assigned based on the values of CS Mets at DX and CS Mets Eval, as shown in the Mets at DX Mets Eval AJCC 6 Table for this schema. When the CS Lymph Nodes code is 200 or 250, the M category for AJCC 6 staging is assigned based on the value of CS Lymph Nodes and CS Nodes Eval as shown in the Lymph Nodes Mets at DX AJCC 6 Table for this schema.