A 9-year-old male rottweiler was presented for evaluation of a large soft mass over the masseter muscle area. The owner reported that the mass developed a few days after this dog got into a serious fight with another dog over some food. Squash preparations were made of some aspirated material. These smears were air-dried and stained with Giemsa. Representative fields are shown at 100X.
What’s the most likely diagnosis in this case?