Collaborative Stage

Note 1: This CS Site-Specific Factor is obsolete beginning with CS Version 2 (codes and notes). Old data are retained, but new cases are not coded with this Factor. Use code 988 for this field.
Note 2: Code the status of extracapsular extension whether assessed clinically or pathologically of any involved regional lymph node(s) coded in the CS Lymph Nodes field. Do not code extracapsular extension in any nodes coded in CS Mets at DX in this field.
Note 3: A statement of the presence or absence of extracasular extension in a pathology report takes priority over clinical assessment. However, if the pathology report contains no statement about extracapsular extension, either positive or negative, the clinical assessment should be coded. If nodes are involved but there is neither a clinical assessment of extranodal extension nor a statement about it in the pathology report, use code 999.
Note 4: According to AJCC (page 24), "Imaging studies showing amorphous speculated margins of involved nodes or involvement of internodal fat resulting in loss of normal oval-to-round nodal shape strongly suggest extracapsular (extranodal) tumor spread; however, pathologic examination is necessary for documentation of the extent of such disease."
Note 5: CS Site-Specific Factor 2 is obsolete beginning with CS Version 2 (codes and notes). Old data are retained, but new cases are not coded with this Factor. Use code 988 for this field.

Code	Description
000	OBSOLETE DATA RETAINED V0200 No extracapsular extension
001	OBSOLETE DATA RETAINED V0200 Extracapsular extension clinically, not assessed pathologically Nodes described as "fixed", not assessed pathologically
005	OBSOLETE DATA RETAINED V0200 Extracapsular extension present pathologically
888	OBSOLETE DATA CONVERTED V0200 See code 987 Not applicable; no lymph node involvement
987	OBSOLETE DATA CONVERTED AND RETAINED V0200 Data converted from code 888 Not applicable; no lymph node involvement
988	Not applicable: Information not collected for this case
999	OBSOLETE DATA RETAINED V0200 Unknown if regional lymph node(s) involved, not stated Regional lymph nodes cannot be assessed Not documented in patient record

CS Site-Specific Factor 2
OBSOLETE - Extracapsular Extension, Lymph Nodes for Head and Neck