Blood Group, Junior System; Jr

Description

Individuals with Jr(a-) blood group lack the Jr(a) antigen on their red blood cells. These individuals may have anti-Jr(a) antibodies in their serum, which can cause transfusion reactions or hemolytic disease of the fetus or newborn. Although the clinical significance of the Jr(a-) blood group has been controversial, severe fatal hemolytic disease of the newborn has been reported. The Jr(a-) phenotype has a higher frequency in individuals of Asian descent, compared to those of European descent (summary by Kim et al., 2010 and Zelinski et al., 2012).

Clinical Features

Phenotypes and symptoms related to Blood Group, Junior System; Jr

  • Anemia
  • Hepatomegaly
  • Cardiomegaly
  • Spontaneous abortion

Incidence and onset information

— Currently we don't have prevalence information about this disease (Not enough data available about incidence and published cases.)
No data available about the known clinical features onset.

Researches and researchers

Currently, we don't have any information about doctors, researches or researchers related to this disease. Please contact us if you would like to appear here.


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Blood Group, Junior System; Jr Recommended genes panels

Panel Name, Specifity and genes Tested/covered
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Sources and references

You can check the following sources for additional information.

OMIM Rare Disease Symptoms Checker

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