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Vaccine adjuvant is gorg on cytology

This month’s case highlight is from Kari Cameron! This a beautiful example of a vaccine hypersensitivity reaction in a 10 mo Yorkie. This pup was vaccinated 2 weeks prior and presented with a marble sized subcutaneous mass between the shoulder blades. 

The cells in these photos are macrophages, and they contain pretty magenta material, consistent with adjuvant (see arrows). 

Thanks for sharing this great case, Kari!

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