Note 1: If there is a discrepancy between the Clark level and the pathologic description of extent, use the higher (more extensive) code.
Note 2: Satellite or in-transit metastasis are coded under CS Lymph Nodes.
Note 3: If there is no documentation of ulceration in the pathology report, assume ulceration is not present.
Note 4: Ulceration is determined by histopathological examination and not on clinical evaluation.
Code | Description | TNM | SS77 | SS2000 |
---|---|---|---|---|
00 | In situ: Noninvasive; intraepidermal Clark level I Basement membrane of the epidermis is intact |
Tis | IS | IS |
10 | Papillary dermis invaded Clark level II |
* | L | L |
20 | Papillary-reticular dermal interface invaded Clark level III |
* | L | L |
30 | Reticular dermis invaded Clark level IV |
* | L | L |
40 | Skin/dermis, NOS Localized, NOS |
* | L | L |
50 | Subcutaneous tissue invaded (through entire dermis) Clark level V |
* | L | RE |
80 | Further contiguous extension: Underlying cartilage, bone, skeletal muscle |
* | D | D |
95 | No evidence of primary tumor | T0 | U | U |
99 |
|
* | U | U |
* For Extension codes 10 - 80, and 99 ONLY, the T category is assigned based on value the of Site-Specific Factor 1, Measured Thickness and Site-Specific Factor 2, Ulceration, as well as Extra Table 1, Thickness and Ulceration and Extra Table 2, Extension and Ulceration.