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Lab Test Dictionary

Porphyrins, Feces (FQPPS)


HPLC; Fluorescence

Specimen Type

Stool, Timed Collection

Performing Lab

Mayo Medical Lab

Epic ID

Other Reference Test

Lab Test Days


Standard TAT

5-7 Days

Collection Information

Specimen Required

10-100 g (24, 48, 72 or 96 Hour) Stool

Container Type

See Below

Collection Instructions

Call lab for special Mayo collection kit. Patient should be instructed to refrain from red meat and aspirin-containing medications for 3 days prior to, as well as during, specimen collection. Compliance should be indicated. No barium, laxatives, or enemas may be used within 24 hours of starting the collection. Keep specimen refrigerated or on ice during collection. Length of collection period is required (24, 48, 72 or 96 Hour). Include a list of medications the patient is currently taking.

Processing Information - Lab Use Only

Transport Temperature


Specimen Stability

Room Temp: Unacceptable; Refrigerated: 14 Days; Frozen:

Rejection Criteria

Specimen <10 grams

Test Volume Required

100 g Timed Stool

Minimum Test Volume

10 g Timed Stool

Processing Instructions

Length of collection period is required. Include a list of medications the patient is currently taking.

CPT Codes