Collaborative Stage Data Set - Revised 11/12/2010 FINAL


CS Site-Specific Factor 10
Clark Level

010Clark level I
In situ, intraepidermal, intraepithelial, noninvasive
Basement membrane of epidermis is intact
020Clark level II
Papillary dermis invaded
030Clark level III
Papillary-reticular dermal interface invaded
040Clark level IV
Reticular dermis invaded
050Clark level V
Subcutaneous tissue invaded (through entire dermis)
988Not applicable: Information not collected for this case
(If this information is required by your standard setter, use of code 988 may result in an edit error.)
998No histologic examination of primary site
999Unknown Clark level or no information
Not documented in patient record

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