The limited number of published clinical studies seems to suggest that it is a rare disorder.

These rare disorders often get worse over time and sometimes are fatal.

Individuals with rare genetic disorders may travel to another country where treatment of these conditions is better understood.

It turned out fine, although our child didn't survive because of an extremely rare genetic disorder.

It is a rare disorder and the causes are unclear.

A year ago he was diagnosed with a rare disorder.

Her mother had suffered a rare disorder which causes parents to make their children ill to get medical attention.

He was 75 and had been suffering from a rare disorder of the nervous system.

Only then did I discover that she had a rare bleeding disorder.

It is a rare disorder, affecting only around 1 in 40,000 individuals.