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Test ID SUAC Succinylacetone, Blood Spot

Useful For

Second-tier newborn screen for tyrosinemia type 1 (HT-1) when primary screen showed nonspecific elevations of tyrosine


Diagnosis of HT-1 when used in conjunction with testing for urine organic acids ,liver function, alpha-fetoprotein, and molecular genetic analysis of FAH

Genetics Test Information

This test is a second-tier newborn screen for tyrosinemia type.

Method Name

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Reporting Name

Succinylacetone, BS

Specimen Type

Whole blood

Ordering Guidance

The preferred test for diagnosis and monitoring of patients with tyrosinemia type 1 is TYRBS / Tyrosinemia Follow Up Panel, Blood Spot.

Necessary Information

Patient's age is required.

Specimen Required

Submit only 1 of the following specimen types:



Specimen Type: Blood Spot

Supplies: Card - Blood Spot Collection (Filter Paper) (T493)


Preferred: Blood Spot Collection Card

Acceptable: Whatman Protein Saver 903 Paper, PerkinElmer 226 (formerly Ahlstrom 226) filter paper, Munktell filter paper, or blood collected in tube containing heparin, ACD or EDTA and dried on filter paper.

Specimen Volume: 2 blood spots

Collection Instructions:

1. At least 1 spot should be complete (ie, unpunched).

2. Do not expose specimen to heat or direct sunlight.

3. Do not stack wet specimens.

4. Keep specimen dry.

5. If collection of a new specimen is necessary, let blood dry on the Blood Spot Collection Card (T493) at ambient temperature in a horizontal position for a minimum of 3 hours.

Specimen Stability Information: Ambient (preferred) 90 days/Refrigerated 90 days/Frozen 90 days

Additional Information:

1. For collection instructions, see Blood Spot Collection Instructions

2. For collection instructions in Spanish, see Blood Spot Collection Card-Spanish Instructions (T777)

3. For collection instructions in Chinese, see Blood Spot Collection Card-Chinese Instructions (T800



Specimen Type: Whole Blood


Preferred: Lavender top (EDTA)

Acceptable: Green top (sodium or lithium heparin) and yellow top (ACD)

Specimen Volume: 2 mL

Collection Instructions: Send whole blood specimen in original tube. Do not aliquot.

Specimen Stability Information: Refrigerate (preferred) 4 days/Ambient 4 days

Specimen Minimum Volume

Blood Spot: 1
Whole Blood: 0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Whole blood Varies

Reference Values


<1.00 nmol/mL



<4 weeks: 40.0-280.0 nmol/mL

≥4 weeks: 25.0-150.0 nmol/mL

Day(s) Performed

Monday through Friday

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information



82542 (if appropriate for government payers)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
SUAC Succinylacetone, BS 53231-7


Result ID Test Result Name Result LOINC Value
22714 Interpretation 59462-2
607629 Succinylacetone 53231-7
607630 Tyrosine 35571-9
22716 Reviewed By 18771-6

Test Classification

This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

Report Available

3 to 5 days

NY State Approved