Collaborative Stage

Note 1: Record the largest residual tumor nodule remaining after the primary ctyoreduction surgery.
Note 2: The surgery to remove as much of the cancer in the pelvis and/or abdomen as possible, reducing the "bulk" of the cancer is called "debulking" or "cytoreduction" surgery.
Note 3: It is performed when there is widespread evidence of advanced stage of ovarian cancer with obvious spread to other organs outside of the ovary typically in the upper abdomen, intestines, the omentum (the fat pad that, like an apron, hangs off the colon) or the diaphragm or liver.
Note 4: This effect of this procedure is associated with patient survival. Therefore recording whether the patient received chemotherapy prior to this procedure is necessary for survival analysis.

Code	Description
000	None No gross residual tumor
010	Residual tumor 1 centimeter or less
020	010 and Received chemotherapy
030	Residual tumor greater than 1 centimeter
040	Residual tumor greater than 1 centimeter
888	OBSOLETE DATA CONVERTED V0200 See code 988 Not applicable for this site
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.)
990	Macroscopic residual tumor, size not stated
991	990 and Received chemotherapy
998	Patient did not have surgery No histologic confirmation
999	Unknown Not documented in patient record

CS Site-Specific Factor 3
Residual Tumor Status and Size After Primary Cytoreduction Surgery