Test Directory

• Heptacarboxyl I
• Coproporphyrin I
• Hexacarboxyl III
• Heptacarboxyl III
• Pentacarboxyl I
• Coproporphyrin III
• Protoporphyrin
• Isocoproporphyrin
• Uroporphyrin I
• Isoheptacarboxyl
• Isohexacarboxyl
• Hexacarboxyl I
• Isopentacarboxyl
• Coprolll/Coprol ratio
• Pentacarboxyl III
• Uroporphyrin III

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.

Specimen Type: Timed Stool

Collection Container: Timed Stool Collection Kit

Desired Specimen Volume: Entire Collection

1. Collect all stool specimens within a 24, 48, 72, or 96 hour timeframe.
2. 24-Hour collection is adequate if the collection volume is at least 100 g.

1. Length of collection period is required.
2. Document on the collection container the duration of the collection period.
3. Include a list of medications the patient is currently taking.
4. Transport timed stool in the original collection container. Freeze.

For 3 days before collection and during the entire specimen collection period, patient must refrain from eating red meat and or taking any aspirin-containing medications.

Patient should not use barium, laxatives, or enemas for 24 hours before starting, as well as during, specimen collection.

Transport to the laboratory frozen. 

• Specimens in preservative
• Specimens weighing less than 10 grams

See patient report.

Specimens smaller than 100 g may not provide accurate results. Aspirin ingestion may cause minimal gastrointestinal bleeding, leading to false elevations of protoporphyrin.

• Congenital Erythropoietic Porphyria (CEP)
• Coproporphyrins
• Erythropoietic Protoporphyria (EPP)
• Hereditary Coproporphyria (HCP)
• Hexacarboxyl porphyrins
• Porphyria Cutanea Tarda (PCT)
• Porphyrin isomers
• Protoporphyrin
• Uroporphyrins
• Variegate Porphyria (VP)
• Isocoproporphyrin
• X-linked Dominant Protoporphyria (XLDPP or XDP)
• Fecal porphyrins