Figure 1. 

A 6-month-old spayed female Domestic Shorthair cat presented to the ER on 3/7/21 for difficulty breathing (dyspnea). About one month prior, she began hiding and showing behavioral changes, and approximately two weeks prior she developed a limp. On the day of presentation, her referring veterinarian noted a nasal mass and sneezing. Despite these signs, the cat maintained a normal appetite and water intake, with no vomiting or diarrhea reported.

Clinical description:

The dermis and subcutaneous tissues of the nasal and frontal bones, caudal to the bridge of the nose, contain a multinodular, firm, tan, 2x1x0.5 cm, raised mass that extends into and partially effaces the nasoturbinates (pyogranulomatous dermatitis). Upon cut section, moderate amounts of creamy-white, purulent material exude from the mass (pus).

Figure 2. Diff-Quick, 400x.

Figure 3. Diff-Quick, 400x.

Figure 4. H&E, 20x magnification.

Figure 5. H&E, 400x magnification.