case_images: PMC9251989_01
case_images: A round, homogeneously soft tissue opaque structure (ie, laryngeal cyst) was appreciated within the larynx on a right lateral radiograph of the head and neck region of the patient. Image courtesy of the referring veterinarian
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case_images: PMC9251989_01_10.1177_20551169221104545-fig1.jpg
case_images: fig1-20551169221104545
case_images: RI 1.9-5.7). Radiographs of the thorax and neck were performed and reviewed by a board-certified veterinary radiologist, with the pertinent finding of a homogeneously soft tissue opaque structure within the larynx, caudal to the epiglottis, which exhibited rounded cranial and caudal margins (Figure 1).
case_images: Photograph of the oral cavity and laryngeal area of the sedated cat demonstrating a large mass (ie, laryngeal cyst) protruding from the left side of the larynx, displacing the arytenoids laterally to the right
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case_images: PMC9251989_01_10.1177_20551169221104545-fig2.jpg
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case_images: On oral examination, on the left side lateral to the arytenoids, an apparently fluid-filled structure was noted, causing complete deviation of the arytenoids to the right and almost total occlusion of the larynx (Figure 2).
case_images: Echolaryngography of the anesthetized cat demonstrating a laryngeal cyst, as outlined by the yellow arrows
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case_images: PMC9251989_01_10.1177_20551169221104545-fig3.jpg
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case_images: The neck was assessed using point-of-care ultrasound and a thin-walled, round, hypoechoic-to-anechoic structure was found within the region of the larynx (Figure 3).
case_images: Post-contrast transverse CT image displayed on a soft tissue window width/window level at the level of the first cervical vertebra. A thin-walled, centrally fluid-attenuating structure (marked with a white star) is seen within the left aspect of the larynx. The structure has a thin, contrast-enhancing peripheral rim (white arrow) and occupies more than 50% of the laryngeal lumen
case_images: 10.1177_20551169221104545-fig4.jpg
case_images: PMC9251989_01_10.1177_20551169221104545-fig4.jpg
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case_images: The CT examination revealed an irregularly ovoid, fluid-attenuating (average Hounsfield units [HU] 13), poorly marginated structure occupying the left aspect of the laryngeal lumen (Figure 4), with a thin, soft tissue-attenuating (average HU 40) peripheral rim.