I saw a documentary about somthing similar last year. Apparently there is a man in England who has the same 'condition'. There was a local police
officer interviewed who collaborated with his story.

“It is hard to describe my experience,” he tells, “Right before the full moon I get terrible headaches and feel aggressive and anxious. My facial features sharpen, my body becomes covered in light grey fuzz, my fingers turn crooked and my perception of smells and sounds dramatically increases. I begin feeling like an animal!”sorce link
Following his brother’s example Leonid applied for security guard’s position and then began working in the police department. He constantly takes part in strength contests but the most difficult struggle is the one within.
Werewolves are commonly known for their demonic service but in the Slavic mythology as opposed to the European one werewolves originally were positive characters who served gods and not demons.
Originally posted by IronMan
wait a moment, werewolves don't exist! what am I doing
here?
There were 30,000 cases of lycanthropy reported in Europe between 1520 and 1630. Lycanthropy was an offence associated with witchcraft which revolved around the themes of murder and and cannibalism, with the occasional incest and rape aside. In many of the trials cited below it is clear that the werewolves were people whom today we would define as serial killers. In other cases where the evidence comes solely from the accused, torture confuses the issue. The vast majority of the trials for lycanthropy were held in the mountainous regions of France, the Auvergne and the Jura, in Germany, and Bohemia and Hungary, the Carpathian mountains - ie. where sheep-grazing and wolves occured naturally together There was, however, a dearth of werewolves in English witch trials and England had trials for cannibalism which would have been charged as lycanthropy had they occurred at that time on the continent.sorce link