Patient (Howling III)

This unnamed patient is a villain from Howling III:  The Marsupials, appearing as the main antagonist in the film-within-a-film, It Came From Uranus.

Donny and Jerboa were among those watching the film, which features a nurse checking on her male patient, who is shown in agony with bulges coming from his face and his neck. In addition, his facial complexion was a greenish color, all the while, the nurse expressed her immense shock over what she was witnessing.

At that moment, the patient rose up and revealed that he was turning into a werewolf, and he was later shown with some hair, fangs, and a muzzle, all the while growling at the nurse. The patient continued turning heel when he let out a loud howl, after which his transformation continued when his muzzle kept extending and his claws elongated. After his transformation was complete, the villainous patient attacked his nurse, clutching her throat with his jaws and eventually killing her.