After Hefford's death, the doctors discovered that she had a rare condition called a urea cycle disorder, which affects how the body breaks down protein, according to the New York Post.

Hyperion Therapeutics' first drug, approved in February by the US Food and Drug Administration, has been welcomed by clinicians as a step forward for people with rare genetic conditions known as ...

By identifying the critical role the urea cycle plays in its development, his findings could pave the way for new medications to treat this currently incurable disease. In a study recently ...

This week, James Roper finally cleared the air, disclosing to USA Today Sports that his son died from a rare hereditary condition called urea cycle disorder. Dr. Sujatha Reddy, 11Alive Medical ...

However, the 25-year-old had not known that she had urea cycle disorder, a genetic condition that makes it difficult for the body to break down protein and eventually causes a build-up of ammonia ...