CT findings of nasal cryptococcosis in cats and dogs: A case series
2022
Cooley, Stacy | Galustanian, Geghani | Moon, Alaina | Summers, Stacie
Cryptococcus spp. can cause chronic rhinitis in cats and dogs. Computed tomography (CT) descriptions of imaging features of nasal cryptococcosis are limited. This retrospective single‐center consecutive case series aimed to describe the CT features of lesions in cats and dogs with nasal cryptococcosis. Ten cats and 12 dogs with a diagnosis of nasal cryptococcosis confirmed with cytology, histopathology, and/or serology that had undergone a head CT from 2010 and 2020 were included. Images were evaluated by a veterinary radiologist for the presence of a nasal or nasopharyngeal mass, regional destruction, intracranial extension, and lymphadenopathy. The majority of cats (8/10 [80%]) had nasal lesions with most cases described as non‐destructive rhinitis (7/8 [88%]). Three cats (3/10 [30%]) had a nasal mass. All cats had a nasopharyngeal mass, and in most cases (8/10 [80%]) the nasopharyngeal mass was centered caudally near the temporomandibular joints. None of the cats had cribriform plate lysis or meningeal enhancement. All dogs had nasal lesions. Eleven dogs (11/12 [92%]) had destructive rhinitis with lysis of nasal conchae. Most dogs (8/12; 67%) had a nasal mass, of which in seven dogs the caudal nasal mass extended into the rostral nasopharynx. Most dogs had cribriform plate lysis (9/12 [75%]), of which four dogs (44%) had mass extension into the cranium. Our findings support potential differences in CT features between dogs and cats with nasal cryptococcosis. Nasal cryptococcosis should be considered a differential diagnosis in dogs and cats with nasal and nasopharyngeal masses.
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