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FQPPS-M
PORPHYRINS, FECES

Test Code FQPPS-M 
Test PORPHYRINS, FECES 
Methodology High-Pressure Liquid Chromatography (HPLC) 
Description Porphyrins are quantitated by fluorescence.
Analysis of the fecal porphyrins should be the first choice of available tests when either coproporphyria or variegate porphyria are suspected or when dermopathic porphyria must be differentiated for a diagnosis of porphyria cutanea tarda, coproporphyria, or variegate porphyria. 
Specimen Stool specimen (48-, 72-, or 96-hour). 24-Hour collection is adequate if the collection volume is approximately 100 g. If 24-hour collection does not weigh 100 g, continue collection period until a 100 g specimen is obtained. SEND ENTIRE COLLECTION FROZEN on dry ice in containers supplied by NorDx.
See "Stool Collections."

NOTE:
1. LENGTH OF COLLECTION PERIOD IS REQUIRED ON REQUEST FORM FOR PROCESSING.
2. Specimen submitted must contain at least 100 g of feces.
3. The patient should be off all medications and alcohol, if possible, for at least 1 week. If clinically inappropriate to discontinue medication, please submit a list of medications with the specimen.
4. Patient should be instructed to refrain from red meat 3 days prior to specimen collection. Compliance should be indicated.
5. Patient should refrain from ingesting alcohol for the 24 hours prior to as well as during the collection. 

Reference Values See "Porphyrins, Feces Reference Values"

See "Porphyrinogens, Porphyrins, and Porphyrias". 

Analytic Time 3 Days 
Day(s) Test Set Up Monday through Friday 
CPT Code(s) 84126  

Special Instructions