Even though there are just a few reported cases, some people suffer from Clinical Lycanthropy, believing strongly that they are werewolves or other animals.
Werewolves are a known myth. For centuries, humans believed that werewolves existed, living as humans until they transform into blood-thirsty beasts during a full moon.
People with clinical lycanthropy feel themselves transforming, believing they have hairy bodies, fangs and claws. They often growl and sometimes see the head of a wolf when they look at themselves in mirrors.
These delusions do not only describe the feeling of metamorphosis into werewolves. The animal 'involved' varies based on culture and location. Delusions of transformation into other animals like leopards, lions, elephants, snakes and crocodiles are also regarded as clinical lycanthropy.
Clinical lycanthropy is however not a diagnosis itself but a complex of symptoms. It is regarded as a rare expression of disorders like bipolar disorder, depression and schizophrenia. Its current treatment is to treat the underlying disorder.