Collaborative Stage

Note 1: Per AJCC, p. 334: "To confirm the elevated serum [lactate dehydrogenase] LDH for staging purposes, it is recommended to obtain two or more determinations obtained more than 24 [hours] h apart, since an elevated serum LDH on a single determination can be falsely positive as a result of hemolysis or other factors unrelated to melanoma metastases."
Note 2: Positive results from two laboratory tests are required to code a positive value in this field. If the first test is positive and the second test is negative, code the results as negative or within normal limits, unless an additional test with positive results is performed. If the first test is positive and there is no second test, record 998 if it is known that a second test was not performed; code 999 if there is no information about a second test. If the only test is negative or within normal limits, code the results from the single test.
Note 3: Record the range for the positive LDH value prior to treatment or within six weeks of diagnosis. Give priority to the first positive test performed. The information should be taken from the same test used to code CS Site-Specific Factors 5 and 6.

Code	Description
000	CONVERTED AND CODE REUSED V0203 Prior to V0203 code defined as "Test not done, test was not ordered and was not performed". Cases converted to code 998 with V0203 and code 000 redefined as "Within normal limits". Within normal limits
002	OBSOLETE DATA CONVERTED V0203 See code 000 Within normal limits
004	OBSOLETE DATA CONVERTED V0203 See code 010 Range 1: Less than 1.5 x upper limit of normal for lactate dehydrogenase (LDH) assay Stated as elevated, NOS
005	OBSOLETE DATA CONVERTED V0203 See code 020 Range 2: 1.5 - 10 x upper limit of normal for LDH assay
006	OBSOLETE DATA CONVERTED V0203 See code 030 Range 3: More than 10 x upper limit of normal for LDH assay
008	OBSOLETE DATA CONVERTED V0203 See code 997 Ordered, but results not in chart
010	Range 1: Less than 1.5 x upper limit of normal for lactate dehydrogenase (LDH) assay Stated as elevated, NOS
020	Range 2: 1.5 - 10 x upper limit of normal for LDH assay
030	Range 3: More than 10 x upper limit of normal for LDH assay
988	Not applicable: Information not collected for this case (If this item is required by your standard setter, use of code 988 will result in an edit 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 4
Serum Lactate Dehydrogenase (LDH)