Test Overview
Test Methodology

High-Performance Liquid Chromatography (HPLC)

Test Usage

Evaluation of patients who present with signs or symptoms suggestive of porphyria cutanea tarda, hereditary coproporphyria, variegate porphyria, congenital erythropoietic porphyria, erythropoietic protoporphyria, or X-linked dominant protoporphyria.

Reference Range *

Interpretive report provided.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Tuesday, Thursday
Analytic Time

4 - 8 days

Soft Order Code
MiChart Code
Porphyrins, Feces
  • Porphyrins, Feces
Reference Laboratory
Mayo FQPPS (81652)
Special Testing
Specimen Requirements
Collection Instructions

Patient should be instructed to refrain from red meat and aspirin-containing medications for 3 days prior to and during specimen collection period. No barium, laxatives, or enemas may be used within 24 hours of starting the collection. Collect stool for a duration of 48, 72, or 96 hours; freeze (preferred) or refrigerate and send entire collection. Note collection duration, start date and time and end date and time on requisition. Also include a list of medications the patient is currently taking.

Normal Volume
Entire 24 - 96 hour stool collection
Minimum Volume
24 hour collection is adequate if the collection volume is approximately 100 g
Additional Information

Test sent to Mayo Medical Laboratories.

CPT Code
Fee Code