Prince Frederik, son of Prince Robert of Luxembourg, has died from a rare genetic disease, his father announced. He was 22. Robert and his wife, Princess Julie of Nassau, announced Frederik's ...

the youngest son of Prince Robert of Luxembourg and Princess Julie of Nassau, died in Paris at age 22 on March 1—a day after Rare Disease Day—of a rare genetic disease known as POLG.

Prince Frederik of Luxembourg died on Feb ... the weekend by his parents, Prince Robert and Princess Julie. He was 22. Frederik was born with PolG disease, a genetic mitochondrial disorder ...

Prince Robert of Luxembourg says when they go awry ... identified a specific folate molecule in a new model of POLG mitochondrial disease that may offer some answers. Research assistant Christine ...

The family announced his death one day after Rare Disease Day, which is the last day of February. His father, Prince Robert of Luxembourg, posted a statement to the POLG Foundation website ...