Is a lycan a born werewolf or is it a half werewolf half vampire like it is off Underworld?

A lycan is a werewolf that can trace its decent from King Lycaon, a mythical King of Arcadian who Zeus turned into a wolf. Lycans inherit their condition rather than have it transmitted to them. They seem to have some degree of control over their transformations and behaviors as opposed to the true werewolf who are uncontrollable and oblivious to their condition.