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Cherry-Specific IgG by Radioallergosorbent Test (RAST), Qualitative [Deprecated]

Published: August 9, 2026Updated: August 17, 2026

A legacy qualitative test for IgG antibodies directed against cherry. It is not commonly used to diagnose food allergy.

Quick summary

["This deprecated test detects cherry-specific IgG antibodies, but a result cannot confirm or rule out cherry allergy."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
21181-3
Short code
Deprecated Cherry IgG RAST Ql
Synonyms
Deprecated Cherry IgG RAST Ql
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
10
Ref high
40
Critical range
— – 500 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
84484
SNOMED
302774002
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What is this test?

This is an older blood test intended to detect IgG antibodies that react with cherry proteins. The radioallergosorbent test method, abbreviated RAST, reports whether such antibodies are present rather than measuring their exact amount.

Why might I need this test?

It may appear in older records or historical food-allergy testing panels. It is not generally recommended for diagnosing a food allergy because IgG antibodies to foods can occur in people who do not have clinical allergy.

How is the test performed?

A blood sample is exposed to cherry material using the RAST method, and the laboratory determines whether detectable cherry-reactive IgG is present. Because the test is qualitative, it does not provide a precise antibody concentration.

How do I prepare for the test?

No special preparation is usually needed for this blood test. Follow any instructions provided by the ordering clinician, particularly if you have a history of allergic reactions to the test materials.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Cherry-Specific IgG (RAST), Qualitative

Frequently asked questions

Does a positive result mean I am allergic to cherries?
No. This test detects IgG antibodies, which may occur without a clinical food allergy. Allergy is generally assessed using the medical history, symptoms, and sometimes skin-prick or specific IgE testing.
Why is this test marked deprecated?
It is an older testing method and is not commonly recommended for current food-allergy evaluation. More clinically relevant allergy testing may be used when indicated.
Can this test determine the severity of a reaction?
No. It is qualitative and does not measure antibody levels or predict how severe an allergic reaction might be.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 17, 2026. · Read our editorial policy