Lycanthropy

noun

1. The state of being a lycanthrope (or werewolf), a person who can shapeshift between the form of a human being and a wolf, often said to happen involuntarily during a full moon; werewolfdom.
2. (mythology, by extension) The state of being a person who can shapeshift between the form of a human being and an animal, whether or not it is a wolf.
3. A delusion in which one believes oneself to be a wolf or other wild animal.