Final Answer:
Alcide Cerveaux, the werewolf, suffers from a condition known as hypertrichosis, which causes excessive hairiness, particularly during the full moon.
Step-by-step explanation:
Hypertrichosis is a rare condition characterized by abnormal hair growth over and above the normal for the age, sex, and race of an individual. In the context of werewolf folklore, the transformation under the full moon is a fictionalized exaggeration of the real medical condition.
Alcide Cerveaux's portrayal as a werewolf in popular culture, such as in literature or movies, often takes creative liberties with medical conditions. Hypertrichosis is a real genetic or acquired condition, but the association with werewolves adds a supernatural twist to the narrative.