Version 2.74


Although genetically independent of the Rh system, the Landsteiner Wiener (LW) blood group antigen system is part of the Rh protein cluster and is expressed more strongly on D positive cells. There are 2 antithetical alleles, LW^a and LW^b with 4 possible phenotypes: LW(a+b-), LW(a-b+), LW(a+b+), and LW(a-b-).(Schenkel-Brunner H. (2000) Landsteiner-Wiener System. In: Human Blood Groups. Springer, Vienna) LW^a has much higher prevalence than LW^b in most populations. Hemolytic disease of the newborn due to anti-LW is rare and mild when it does occur []. Source: Regenstrief LOINC

Basic Part Properties

LW super little a
Part Type
Component (Describes the core component or analyte measured)
Created On
Construct for LOINC Short Name
LW sup(a)

LOINC Terminology Service (API) using HL7® FHIR®

CodeSystem lookup$lookup?system=

Language Variants

Tag Language Translation
zh-CN Chinese (China) LW^a
Synonyms: LW super little a
fr-CA French (Canada) LW exposant petit a
et-EE Estonian (Estonia) LW^a
es-ES Spanish (Spain) LWa
it-IT Italian (Italy) LW apice a
Synonyms: LW^a
tr-TR Turkish (Turkey) LW süper küçük a
ru-RU Russian (Russian Federation) LW супер малое a
Synonyms: LW^a
nl-NL Dutch (Netherlands) LW super kleine a
fr-BE French (Belgium) LW exposant petit a