Korean J Urol.  2007 Dec;48(12):1319-1321. 10.4111/kju.2007.48.12.1319.

Solitary Fibrous Tumor as Misdiagnosed as Bladder Cancer

• Lee SK
• Moon KH
• JI YH
• Hwang HH
• Choo HS
• Kim YM
• Park RJ

• KMID: 1990158
• DOI: http://doi.org/10.4111/kju.2007.48.12.1319

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.

Keyword

Solitary fibrous tumor; Bladder; Mesenchyme

MeSH Terms

Adult
Humans
Lower Urinary Tract Symptoms
Mesoderm
Pleura
Solitary Fibrous Tumor, Pleural
Solitary Fibrous Tumors*
Urinary Bladder Neoplasms*
Urinary Bladder*

Figure

• 

  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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