Michael was born with a disease called William's syndrome, which effects 1 in 20,000 children.

When these problems occur together, it is called Felty's syndrome.

This collection of symptoms would later be called Bálint's syndrome.

But that may be because some people suffer from a syndrome called red wine headache, whose cause is unknown.

It is also the first line of defense for a rare disorder called stiff-person syndrome.

Dry mouth can be caused by a medical condition called Sjögren's syndrome.

Taking these medicines together can cause a very rare but serious condition called serotonin syndrome.

But in the late 1980s, the supplement was associated with a serious condition called eosinophilia-myalgia syndrome.

So common is the condition among women who have recently given birth that it is sometimes called "new mom's syndrome."

This medication may rarely cause a very serious condition called serotonin syndrome.