Alkaline phosphatase may be increased in the CSF of patients with intracranial germ cell tumors. When increased, isoenzyme testing can identify if a heat-stable isoenzyme (ie, germ cell or placental) is present but cannot quantify the amount of activity.
Quantitative Heat Inactivation/Enzymatic
Transfer 2 mL CSF to an ARUP Standard Transport Tube and refrigerate or freeze ASAP or within 2 hours. (Min: 1 mL)
Refrigerated or frozen.
Specimens collected in EDTA, potassium oxalate, sodium citrate, or sodium fluoride. Grossly hemolyzed or lipemic specimens
After separation from cells: Ambient: 2 hours; Refrigerated: 1 week; Frozen: 1 month
Effective January 17, 2012
Total Alkaline Phosphatase: 0-1 U/L
Laboratory Developed Test (LDT)
|Component Test Code*||Component Chart Name||LOINC|
|2005737||CSF Alkaline Phosphatase Total|
|2005738||CSF Alk Phos Bone Calc|
|2005739||CSF Alk Phos Liver Calc|
|2005740||CSF Alk Phos Other Calc|
- ALK PHOS
- Alkaline Phosphatase