Ultrasonographic features of feline renal neoplasia: a retrospective study on 187 cases

Objectives Ultrasonography plays a crucial role in diagnosing feline renal diseases, including neoplasia. The aims of this study were to describe ultrasonographic features of renal neoplasia in cats and to investigate potential differences between tumor types. Methods In this multicenter retrospective study, ultrasonographic images of feline kidneys with cytologically/histologically confirmed renal neoplasia were reviewed. For each kidney, ultrasonographic characteristics (renal length, presence and appearance of a mass, nodules, hypoechoic subcapsular rim, pelvic distension, retroperitoneal effusion) were recorded and compared for each tumor type. Results A total of 187 cats (373 kidneys) were included. Tumor types were lymphoma (n = 118, 63%), carcinoma (n = 53, 28.5%), sarcoma (n = 10, 5%), adenoma (n = 3, 2%), histiocytic sarcoma (n = 2, 1%) and nephroblastoma (n = 1, 0.5%). Bilateral disease ( P