Imagine finding out that you have a disease that only a handful of people around the world have. Kirstie and Catherine Fields don't have to imagine it. The teenage Welsh twins have what is probably ...

A man with confusion and signs of a brain injury actually had an extremely rare condition diagnosed in just 50 people over the past century. The unidentified 76-year-old was rushed to his local ...

In this video, Mikhail Varshavski, DO, who goes by "Dr. Mike" on YouTube, looks at some of the rarest medical conditions. Following is a partial transcript of the video (note that errors are possible) ...

A Nyack boy was born with one of the rarest diseases, and now his parents are on a mission to help families like theirs. Peter Najm was born with KAT6A, a disease that impairs the development of the ...