Amino Acid Analysis Blood Test, LC/MS

The Amino Acid Analysis Blood Test, LC/MS, detects 34 different amino acids in the blood and helps diagnose various inborn errors in metabolism.

Quest
LabCorp

Sample Report

Test Code: 700068

CPT Code: 82139

Also Known As:

Methodology:

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

Specimen Type: Plasma

Preparation:

Fasting for at least 8 hours prior to collection is required.

Test Results:

4-7 days. May take longer based on weather, holiday, or lab delays.

Sample Report

Test Code: 767

CPT Code: 82139

Also Known As:

Methodology:

Chromatography/Mass Spectrometry

Specimen Type: Plasma

Preparation:

Fasting for at least 8 hours prior to collection is required.

Test Results:

6-8 days. May take longer based on weather, holiday, or lab delays.

Description

This Amino Acid Analysis Blood Test, LC/MS, includes the following:

1-Methylhistidine | 3-Methylhistidine
Alanine | Alpha-Amino Adipic Acid | Alpha-Amino Butyric Acid |Arginine | Asparagine | Aspartic Acid
Beta-Alanine | Beta-Amino Isobutyric Acid
Citrulline | Cystathionine
Ethanolamine
Gamma-Amino Butyric Acid | Glutamic Acid (Glutamate) | Glutamine | Glycine
Histidine | Homocysteine | Hydroxyproline
Isoleucine
Leucine | Lysine
Methionine
Ornithine
Phenylalanine | Proline
Sarcosine | Serine
Taurine | Threonine | Tryptophan | Tyrosine
Valine

What are amino acids?

Amino acids are organic compounds essential in digestion, creating usable energy, maintaining health, and functioning normally. This panel can help discover deficiencies in amino acids and tests for 34 different amino acids. Amino acids serve many functions, including building blocks for proteins, neurotransmitters, hormone precursors, and enzyme co-factors. More than 70 disorders of amino acid metabolism have been described. The clinical manifestations of these disorders are diverse.

What is the purpose of this test?

Order this Amino Acid Analysis Blood Test, which detects 34 different amino acids in the blood and helps to diagnose a variety of inborn errors of metabolism. These include but are not limited to the following:

Phenylketonuria
Tyrosinemia
Citrullinemia
Non-ketotic hyperglycinemia
Maple syrup urine disease
Homocystinuria

In addition, healthcare providers may use this panel to:

Diagnose primary aminoacidopathies
Screen for secondary aminoacidopathies
Monitor the effects of treatment plans
Assess nutritional status

What do abnormal amino acid levels indicate?

Elevation of one or more amino acids may be diagnostic of an aminoacidopathy. Elevated amino acid levels are also associated with noninherited diseases such as severe liver disease and renal tubular disorders (e.g., Fanconi syndrome). Decreased levels of amino acids are associated with malnutrition, as seen in older individuals or those with inadequate protein intake or gastrointestinal disease.

When should I order an Amino Acid Analysis Blood Test, LC/MS?

Individuals may order this test if they have experienced symptoms related to inborn errors of metabolism. Common signs or symptoms of inborn errors of metabolism include:

Involuntary weight loss, or a failure to gain weight
Stunted growth in babies and children
Developmental delays in babies and children
Fatigue
Hypoglycemia or low blood sugar
Loss of appetite
Stomach problems or
Nausea or vomiting
Acidic blood
Liver disorder
Seizures

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