Masuyama Ayano, Toshima Atsushi, Nakajima Asami, Murakami Masahiro
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN 47906, USA.
Japan Small Animal Medical Center, Tokorozawa 359-0023, Japan.
Vet Sci. 2024 Mar 20;11(3):134. doi: 10.3390/vetsci11030134.
Ultrasonographic subcapsular thickening caused by renal neoplasia other than lymphoma has been previously reported in cats; however, detailed information is lacking. This study aims to describe ultrasonographic findings in renal subcapsular thickening and renal parenchyma in cats diagnosed or presumed with primary and metastatic carcinoma in the kidney. Ultrasound reports were retrospectively searched from 3 veterinary hospitals and 6 cats with 9 affected kidneys were included. Renal lesions were confirmed either cytologically or histopathologically as primary renal carcinoma with metastasis in the contralateral kidney (in 1 case), or metastatic pulmonary carcinoma (in 3 cases). Two patients were cytologically diagnosed with pulmonary carcinoma with concurrent renal subcapsular thickening. Eight kidneys affected by metastatic carcinomas showed relatively thin, focal, and homogeneously hypoechoic subcapsular thickening while a single kidney affected by primary renal carcinoma showed markedly thick, circumferential, and heterogeneously mixed iso- to hypoechoic lesion. The renal parenchyma, especially when just beneath the subcapsular lesion, exhibited at least one abnormality in all affected kidneys, most characterized by hyperechoic renal cortex with concurrent hypoechoic striations. This is the first report describing metastatic carcinoma causing renal ultrasonographic subcapsular thickening in cats. Our results suggest that renal carcinoma should be included in differential diagnoses when ultrasonographic subcapsular thickening is present in cats.
除淋巴瘤外，由肾肿瘤引起的猫超声检查下肾包膜下增厚此前已有报道；然而，详细信息尚缺。本研究旨在描述经诊断或推测患有原发性和转移性肾癌的猫的肾包膜下增厚及肾实质的超声检查结果。回顾性检索了3家兽医医院的超声报告，纳入了9个肾脏受影响的6只猫。肾病变经细胞学或组织病理学确诊为原发性肾癌伴对侧肾脏转移（1例）或转移性肺癌（3例）。2例患者经细胞学诊断为肺癌并发肾包膜下增厚。8个受转移性癌影响的肾脏显示相对较薄、局灶性且均匀低回声的包膜下增厚，而1个受原发性肾癌影响的肾脏显示明显增厚、呈环形且不均匀混合等回声至低回声病变。肾实质，尤其是在包膜下病变正下方时，在所有受影响的肾脏中均表现出至少一种异常，最典型的特征是高回声肾皮质伴低回声条纹。这是首篇描述转移性癌导致猫肾超声检查下包膜下增厚的报告。我们的结果表明，当猫出现超声检查下包膜下增厚时，肾癌应纳入鉴别诊断。
