LOINC
Version 2.70

97981-5Hazelnut recombinant (rCor a) 9 IgG4 Ab [Mass/volume] in SerumActive

Part Descriptions

LP426476-0   Corylus avellana recombinant (rCor a) 9
Common Hazel (Corylus avellana) Cor a 9 is purified from a hazelnut extract. Sensitization to Cor a 9 has been reported to be associated with severe hazelnut allergy in children and adults. [PMID: 12209105] Source: Regenstrief LOINC

LP32397-9   Ab.IgG4
IgG4 is the least common subtype of IgG, and it has a variety of functions. In the context of allergic disease it is thought to have an immune-inhibitory role in preventing anaphylaxis and is commonly known as a “blocking” antibody. IgG4 binding to an allergen can compete with IgE-mediated binding, thereby inhibiting the activation of mast cells and basophils and IgE-mediated presentation to T-cells. Measuring IgG4 and its ratio to IgE has a role in monitoring allergen specific immunotherapy [PMID: 26023323] . IgG4 is also thought to have a role in autoimmunity and be involved in a less defined entity known as IgG4-Related Disease, a chronic immune-mediated fibroinflammatory disorder that often manifests with tumor-like masses .[https://www.merckmanuals.com/professional/musculoskeletal-and-connective-tissue-disorders/igg4-related-disease/igg4-related-disease] Source: Regenstrief LOINC

Fully-Specified Name

Component
Corylus avellana recombinant (rCor a) 9 Ab.IgG4
Property
MCnc
Time
Pt
System
Ser
Scale
Qn
Method

Additional Names

Short Name
Hazelnut (rCor a) 9 IgG4-mCnc
Display Name
Hazelnut recombinant (rCor a) 9 IgG4 (S) [Mass/Vol]
Consumer Name Alpha
Hazelnut recombinant (rCor a) 9 IgG4 antibody

Basic Attributes

Class
ALLERGY
Type
Laboratory
First Released
Version 2.70
Last Updated
Version 2.70
Order vs. Observation
Both

Example Units

Unit Source
mg/L Example UCUM Units

LOINC FHIR® API Example - CodeSystem Request Get Info

https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=97981-5