Huge schwannoma arising from the renal sinus: A case report with imaging and literature review

Q4 Medicine

Radiology Case Reports Pub Date : 2025-05-01 DOI:10.1016/j.radcr.2025.04.007

Takahiro Yamamoto MD, PhD , Akiko Narita MD, PhD , Toshinobu Saga MD , Hiroaki Okada MD, PhD , Nozomu Matsunaga MD , Hisashi Kawai MD, PhD , Taiki Masumori MD, PhD , Keishi Kajikawa MD, PhD , Taishi Takahara MD, PhD , Kojiro Suzuki MD, PhD

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Abstract

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.

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肾窦巨大神经鞘瘤1例影像学及文献复习

肾窦神经鞘瘤极为罕见。在这项研究中，我们报告了一个基于术前影像学怀疑起源于肾窦的大神经鞘瘤病例。一名40多岁的男性，在进行腹部CT扫描以发现肾功能下降的潜在原因时，偶然发现右肾有一个大肿瘤，因此被转介到我院。肿瘤是一个边界清楚的肿块，直径17cm，包含大的囊性变性。增强CT显示肿瘤压迫肾实质、肾盂及肾动脉的正常结构。MRI检查。肿瘤实部在t2加权图像上呈均匀的微高信号。因此，行肾切除术。病理检查为起源于肾窦的神经鞘瘤。如果在肾窦内发现边界清楚的巨大肿瘤，则应将神经鞘瘤列入鉴别诊断。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiology Case Reports Medicine-Radiology, Nuclear Medicine and Imaging

CiteScore

1.10

自引率

0.00%

发文量

1074

审稿时长

30 days

期刊介绍： The content of this journal is exclusively case reports that feature diagnostic imaging. Categories in which case reports can be placed include the musculoskeletal system, spine, central nervous system, head and neck, cardiovascular, chest, gastrointestinal, genitourinary, multisystem, pediatric, emergency, women''s imaging, oncologic, normal variants, medical devices, foreign bodies, interventional radiology, nuclear medicine, molecular imaging, ultrasonography, imaging artifacts, forensic, anthropological, and medical-legal. Articles must be well-documented and include a review of the appropriate literature.