Case Report
Copyright ©The Author(s) 2022. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Clin Cases. Sep 26, 2022; 10(27): 9798-9804
Published online Sep 26, 2022. doi: 10.12998/wjcc.v10.i27.9798
Solitary fibrous tumor of the renal pelvis: A case report
Min Liu, Chao Zheng, Jin Wang, Ji-Xue Wang, Liang He
Min Liu, Jin Wang, Ji-Xue Wang, Liang He, Department of Urology, The First Hospital of Jilin University, Changchun 130021, Jilin Province, China
Chao Zheng, Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun 130021, Jilin Province, China
Author contributions: Liu M and Zheng C collected the information; Wang J conducted the follow-up; Wang JX validated the figures; Zheng C examined and photographed the pathological findings; He L conceptualized and organized the study, reviewed the literature and drafted the manuscript.
Supported by The Youth Foundation of The First Hospital of Jilin University, No. JDYY102019001 and JDYY11202010, the Science and Technology Development Program of Jilin Province, No. 2020122256JC, and the Project of Jilin Provincial Department of Education, No. JJKH20221072KJ.
Informed consent statement: Informed written consent was obtained from the patient for publication of this report and any accompanying images.
Conflict-of-interest statement: All authors disclose no relevant relationships.
CARE Checklist (2016) statement: The authors have read the CARE Checklist (2016), and the manuscript was prepared and revised according to the CARE Checklist (2016).
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See:
Corresponding author: Liang He, Doctor, Department of Urology, The First Hospital of Jilin University, 71 Xinmin Road, Chaoyang District, Changchun 130021, Jilin Province, China.
Received: March 30, 2022
Peer-review started: March 30, 2022
First decision: May 30, 2022
Revised: March 30, 2022
Accepted: August 16, 2022
Article in press: August 16, 2022
Published online: September 26, 2022

Solitary fibrous tumor (SFT) is a rare mesenchymal neoplasm. SFT derived from the renal pelvis is an exceedingly rare entity. In this study, we report a case of renal pelvis SFT and review the relevant literature on this rare tumor.


A 76-year-old man was hospitalized due to right lumbar and abdominal pain. Abdominal computed tomography showed a hypervascular space-occupying renal lesion, sized 2.3 cm × 1.8 cm. Based on the computed tomography findings, the patient was diagnosed with right renal pelvis tumor and underwent nephrectomy. Postoperative immunohistochemical results confirmed the diagnosis. As of the 3-year follow-up, there were no signs of recurrence, and the patient has recovered well.


We report a rare case of SFT derived from the renal pelvis and discuss the imaging and histopathological features that distinguish renal pelvis SFT from other renal pelvis tumors.

Keywords: Renal pelvis, Solitary fibrous tumor, Surgery, Computed tomography, Case report

Core Tip: Extrapleural solitary fibrous tumor is an extremely rare mesenchymal neoplasm, especially in cases of origination from the renal pelvis. We report a rare case of renal pelvis solitary fibrous tumor and discuss the detailed radiologic and pathologic findings. The differential diagnosis of renal pelvis solitary fibrous tumor is discussed based on literature review.