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People with this rare genetic condition can't repair damage to their DNA

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Summary
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DNA ligase IV ( LIG4 ) syndrome is an extremely rare inherited condition that was first reported in the U.K. in 1990 .

It is caused by a mutation in the LIG4 gene, which carries the instructions needed to make a protein that helps repair a specific type of DNA damage.

People with the condition typically experience an array of symptoms, which may either develop soon after birth or later in life.

Symptoms include microcephaly , when a baby's brain is much smaller than expected; delays in growth and development; and a reduction in the amount of cells in the blood, including immune cells.

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