Some medical conditions are so baffling to doctors and researchers that their exact origins remain a mystery.
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Giant limbs and random lumps of fat. Music-induced seizures. Persistent sexual arousal syndrome.
They are conditions that have not made an indelible mark in the tomes of medicine.
Bring them up in front of a physician and in some cases you may get little more than a blank stare.
But they exist, sometimes as a rare disorder, sometimes as a disorder that falls between many medical specialties, and sometimes as an extreme form of a normal bodily function that most people experience every day.
And while the thought of a giant port-wine stain or uncontrollable hiccups are cocktail-party fodder for some, they can be a source of difficulty and shame for those who experience them firsthand.
Sometimes there are cures for what ails them but most often people with these strange conditions must move forward with their lives, coping with physical, social and emotional discomfort, because there is no cure.
The following pages feature some of the more unusual medical conditions that have received recent media attention.
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