Collaborative Stage

Note 1: Carbohydrate Antigen 125 (CA-125), also known as cancer antigen 125, mucin 16, or MUC16, is a protein which in humans is encoded by the MUC16 gene. CA-125 is a tumor marker or biomarker that may be elevated in the blood of some patients with primary peritoneal carcinoma.
Note 2: Record only the blood or serum CA-125 value for this data item. Do not record CA-125 test results based on fluid from the chest or abdominal cavity.
Note 3: Record the CA-125 status prior to treatment.
Note 4: Normal values may vary with patient age and from lab to lab. The typical human reference ranges are 0 to 35 micrograms per milliliter (ug/ml).

Code	Description
000	OBSOLETE DATA CONVERTED V0203 See code 998 Test not done
010	Positive/elevated
020	Negative/normal; within normal limits
030	Borderline; undetermined whether positive or negative
080	OBSOLETE DATA CONVERTED V0203 See code 997 Ordered, but results not in chart
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.)
997	Test ordered, results not in chart
998	Test not done (test not ordered and not performed)
999	Unknown or no information Not documented in patient record

CS Site-Specific Factor 1
Carbohydrate Antigen 125 (CA-125)