Yamamoto Takahiro, Narita Akiko, Saga Toshinobu, Okada Hiroaki, Matsunaga Nozomu, Kawai Hisashi, Masumori Taiki, Kajikawa Keishi, Takahara Taishi, Suzuki Kojiro
Department of Radiology, Aichi Medical University, 1-1 Yazako Karimata, Nagakute City, Aichi, 480-1195, Japan.
Department of Urology, Aichi Medical University, 1-1 Yazako Karimata, Nagakute City, Aichi, 480-1195, Japan.
Radiol Case Rep. 2025 May 1;20(7):3454-3458. doi: 10.1016/j.radcr.2025.04.007. eCollection 2025 Jul.
Renal sinus schwannomas are extremely rare. In this study, we inform a case of a large schwannoma that was suspected to have originated in the renal sinus based on preoperative imaging. A male in his 40s was referred to our hospital due to the incidental detection of a large tumor in his right kidney was during an abdominal CT scan performed to discover the underlying cause of decreased renal function. The tumor was a well-circumscribed mass, 17 cm in diameter, and contained large cystic degeneration. The contrast-enhanced CT revealed that the tumor was pressing on the normal structures of the renal parenchyma, renal pelvis, and renal artery. MRI was taken. The solid part of the tumor showed a uniform slightly high signal on T2-weighted image. Consequently, nephrectomy was performed. On pathological examination, the tumor was schwannoma originated in the renal sinus. If a huge well-circumscribed tumor is found in the renal sinus, a schwannoma should be listed in the differential.
肾窦神经鞘瘤极为罕见。在本研究中，我们报告了一例大型神经鞘瘤病例，根据术前影像学检查怀疑其起源于肾窦。一名40多岁男性因腹部CT扫描发现右肾有一个大肿瘤而被转诊至我院，此次CT扫描是为了查明肾功能下降的潜在原因。肿瘤为边界清晰的肿块，直径17厘米，伴有大量囊性变。增强CT显示肿瘤压迫肾实质、肾盂和肾动脉的正常结构。进行了MRI检查。肿瘤的实性部分在T2加权图像上显示均匀的略高信号。因此，实施了肾切除术。病理检查显示，该肿瘤为起源于肾窦的神经鞘瘤。如果在肾窦发现一个巨大的边界清晰的肿瘤，鉴别诊断时应考虑神经鞘瘤。
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