Villanueva Lucia Alejandra Alfaro, Knust Maira, Quintella Leonardo, Suassuna José Hermógenes R, Araújo Nordeval C
Hospital Universitário Pedro Ernesto, Vila Isabel, Rio de Janeiro, RJ, Brasil.
J Bras Nefrol. 2018 Jan-Mar;40(1):86-90. doi: 10.1590/1678-4685-JBN-3787. Epub 2018 Apr 19.
Renal oncocytoma is an infrequently reported renal neoplasm, often asymptomatic, which usually behaves as a benign entity and is identified accidentally on radiological imaging. Transplant patients under long-term immunosuppressive drugs have a high prevalence of cancers, such as skin cancers, lymphoproliferative disorders, and renal carcinomas. We present a case report of an asymptomatic renal oncocytoma in a kidney transplant recipient presenting persistent hematuria. The features of computed tomography and contrast-enhanced ultrasound (CEUS) are presented. This was the first time we used CEUS in a transplant kidney recipient presenting a renal mass, allowing the real-time visualization of contrast-enhancement patterns during all vascular phases for the differential diagnosis of renal tumors. Although the pattern of intense vascularization could mislead to an early judgment as a malignant lesion, it could help to exclude other renal lesions without inducing nephrotoxicity.
肾嗜酸细胞瘤是一种报道较少的肾肿瘤，通常无症状，一般表现为良性病变，常在影像学检查时偶然发现。长期使用免疫抑制药物的移植患者患癌症的几率较高，如皮肤癌、淋巴增殖性疾病和肾癌。我们报告一例肾移植受者无症状肾嗜酸细胞瘤伴持续性血尿的病例。文中呈现了计算机断层扫描和对比增强超声（CEUS）的特征。这是我们首次在出现肾肿块的移植肾受者中使用CEUS，它能在所有血管期实时显示对比增强模式，有助于肾肿瘤的鉴别诊断。尽管强烈的血管化模式可能会误导早期判断为恶性病变，但它有助于排除其他肾病变，且不会引起肾毒性。
