Wisnoski Megan, Gremillion Christine, Levine Gwendolyn, Coy Cambridge, Veitch Kaylynn, Waller Kenneth, Griffin John F
Department of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA.
Department of Surgical Sciences, University of Wisconsin, Madison, Wisconsin, USA.
Vet Radiol Ultrasound. 2025 Jan;66(1):e13467. doi: 10.1111/vru.13467.
Computed tomography is commonly used to evaluate feline otic disease; however, published studies characterizing the CT appearance of ear canal neoplasia are limited. The purpose of this multicenter, retrospective, secondary analysis, cross-sectional study was to describe the CT features of histopathologically confirmed feline ear canal neoplasia. The CT studies of 25 cats with ear canal neoplasia were prospectively scored by consensus of two veterinary radiologists. Recorded parameters were the presence of focal or multifocal tissue enlargement (mass/masses), lesion shape, location of the center of mass, attenuation characteristics, features of contrast enhancement, involvement of otic structures, calvarial and brain changes, changes of nearby structures, and lymphadenopathy. There was a significant overlap of CT findings between cats with malignant ceruminous gland neoplasia, ceruminous gland adenoma, and squamous cell carcinoma (SCC). Ceruminous gland adenoma was typically homogeneous in attenuation with homogeneous contrast enhancement and no intralesional fluid accumulations (IFAs) or involvement of adjacent structures. In contrast, SCC consistently had heterogeneous attenuation, heterogeneous contrast enhancement, IFAs, and involvement/invasion of adjacent structures. Malignant ceruminous gland neoplasia had variable attenuation and pattern of contrast enhancement with occasional IFAs and occasional involvement/invasion of adjacent structures. Knowledge of these imaging features will inform the creation of prioritized differential diagnosis lists. However, a biopsy is required to confirm the diagnosis.
计算机断层扫描常用于评估猫的耳部疾病；然而，已发表的关于耳道肿瘤CT表现特征的研究有限。这项多中心、回顾性、二次分析横断面研究的目的是描述经组织病理学证实的猫耳道肿瘤的CT特征。两名兽医放射科医生通过共识对25只患有耳道肿瘤的猫的CT研究进行前瞻性评分。记录的参数包括局灶性或多灶性组织增大（肿块）的存在、病变形状、肿块中心位置、衰减特征、对比增强特征、耳部结构受累情况、颅骨和脑部变化、附近结构变化以及淋巴结病。恶性耵聍腺肿瘤、耵聍腺腺瘤和鳞状细胞癌（SCC）的猫之间的CT表现存在显著重叠。耵聍腺腺瘤的衰减通常均匀，对比增强均匀，无瘤内液体聚集（IFA）或相邻结构受累。相比之下，SCC始终具有不均匀衰减、不均匀对比增强、IFA以及相邻结构受累/侵犯。恶性耵聍腺肿瘤的衰减和对比增强模式各不相同，偶尔有IFA，偶尔有相邻结构受累/侵犯。了解这些影像学特征将有助于制定优先鉴别诊断清单。然而，确诊需要活检。
