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Lee, Moon, JI, Hwang, Choo, Kim, and Park: Solitary Fibrous Tumor as Misdiagnosed as Bladder Cancer
Case Report
Korean Journal of Urology

Korean Journal of Urology 2007; 48(12): 1319-1321.

Published online: 31 December 2007

DOI: https://doi.org/10.4111/kju.2007.48.12.1319

Solitary Fibrous Tumor as Misdiagnosed as Bladder Cancer

Seung Kyu Lee, Kyung Hyun Moon, Young Hwan JI, Hyun Ho Hwang, Hyun Soo Choo, Young Min Kim1, Ro Jung Park

Department of Urology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.

1Department of Pathology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.

Corresponding author (rjpark@uuh.ulsan.kr)

Received 17 September 2007       Accepted 2 October 2007

Copyright © 2007 The Korean Urological Association

Abstract

Solitary fibrous tumor (SFT) was previously named localized fibrous mesothelioma, and this is a rare mesenchymal neoplasm that usually shows benign behavior. It is the most commonly recognized tumor of the pleura. These tumors have been recently reported to be found in unexpected locations. To the best of our knowledge, there have been only 2 reports of SFT arising from the urinary bladder in Koreans. We review this third case of SFT that was misdiagnosed as bladder cancer. This tumor was removed from a 40-year-old man who had a history of lower urinary tract symptoms.

Keywords: Solitary fibrous tumor, Bladder, Mesenchyme

Figures and Tables

Fig. 1
Preoperative transrectal ultrasonography revealed about a 3.6×3.4×3.7cm (25.9g) sized central protruding mass (A), and computerized tomography showed a round shaped intravesicular protruding mass that was probably due to prostatic gland enlargement (B). The round shaped solid mass showing partially hyperemic mucosa with a yellowish crust is observed in the left bladder trigone (C: intraoperative photograph). Photomicrography showed the characteristic "patternless pattern" of spindle cells with abundant collagenous deposition. On the immunohistochemical staining, the tumor cells showed diffuse, strong immunoreactivity for CD34 (D: H & E, reduced from ×400, E: reduced from ×400). Postoperative T2 weighted magnetic resonance imaging showed a 1.2×1.6×1.1cm sized residual solid mass in the intravesical mass (F).
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