Collaborative Stage for TNM 7 - Revised 12/31/2009 [ Schema ]
| Code | Description |
| 010 | Clark's level I In situ: noninvasive; intraepidermal Basement membrane of epidermis is intact |
| 020 | Clark's level II Papillary dermis invaded |
| 030 | Clark's level III Papillary-reticular dermal interface invaded |
| 040 | Clark's level IV Reticular dermis invaded |
| 050 | Clark's level V Subcutaneous tissue invaded (through entire dermis) |
| 888 | OBSOLETE DATA CONVERTED V0200 See code 988 Not applicable for this site |
| 987 | Not applicable, not squamous cell carcinoma of skin of eyelid |
| 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.) |
| 998 | No histologic examination of primary site |
| 999 | Unknown Clark's level Cannot be assessed Not documented in patient record |