LDH (Lactate Dehydrogenase) Lab Value, measured in serum, is a predictor of treatment response, progression-free survival and overall survival for patients with Stage IV melanoma of the skin.

LDH (Lactate Dehydrogenase) Lab Value is a Registry Data Collection Variable in AJCC. It was previously collected as LDH Pretreatment Lab Value and Melanoma Skin, CS SSF# 5.

0.0	0.0 (U/L)
0.1-99999.9	0.1–99,999.9 U/L
XXXXX.1	100,000 U/L or greater
XXXXX.7	Test ordered, results not in chart
XXXXX.8	Not applicable: Information not collected for this case (If this item is required by your standard setter, use of code XXXXX.8 will result in an edit error.)
XXXXX.9	Not documented in medical record LDH (Lactate Dehydrogenase) Pretreatment Lab Value not assessed or unknown if assessed

Each Site-Specific Data Item (SSDI) applies only to selected primary sites, histologies, and years of diagnosis. Depending on applicability and standard-setter requirements, SSDIs may be left blank.