Porphyrins, 24-hour stool

Alphabetical Test listing

Porphyrins, 24-hour stool-994

Test name:

Test number:

994

Excellian order number:

LAB994

Abbreviation:

MSO

Alternate names:

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

Useful for:

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.

Limitations:

Specimens smaller than 100 g may not provide interpretable results

Patient preparation information:

Patient should be instructed to refrain from red meat and aspirin-containing medications for 3 days prior to, as well as during, specimen collection.
No barium, laxatives, or enemas may be used within 24 hours of starting the collection.

Specimen type:

Stool, timed collection (48, 72 or 96-hr)

Collection container:

Stool collection kit (Mayo)

Volume:

100 g

Minimum volume:

10 g

Collection instructions:

Use as many containers as necessary
Label all containers X of X (eg. 1 of 2, 2 of 2)

Processing instructions:

Freeze

Submit all containers

Transport container:

Mayo stool collection jar

Required forms/information:

Length of collection period is required
Include a list of medications the patient is currently taking
Indicate patient compliance of diet/medications recommendations listed in patient preparation

Transport and stability:

Frozen (preferred) - 14 days

Refrigerated - 14 days

Specimen retention time:

1 week

Performing lab:

Mayo Clinic Laboratories (FQPPS): R-MM

Days set up:

Tu, Th

TAT:

3 - 7 days

Method:

High-Performance Liquid Chromatography (HPLC)

Porphyrins are quantified by fluorescence

Reference ranges:

See report

CPT codes:

84126

Date created:

11/30/2001

Revised date:

01/02/2024

Review date:

01/02/2024