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KMID : 0357920040380020129
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Korean Journal of Pathology
2004 Volume.38 No. 2 p.129 ~ p.131
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Solitary Fibrous Tumor of the Urinary Bladder - A Case Report -
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Lee Jong-Sil
Hwa Jeong-Seok
Ko Gyung-Hyuck
Lee Jeong-Hee
Kim Hwal-Woong
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Abstract
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Solitary fibrous tumor (SFT) most commonly affects the pleura and these tumors have been recently reported to be found in unusual locations. We describe here a solitary fibrous tumor of the urinary bladder that was removed from a 79-year-old man having a history of gross hematuria and dysuria. Transabdominal ultrasonography showed a huge soft tissue mass in the urinary bladder. The cut surface of the tumor showed a grayish-white, hemorrhagic and gelatinous appearance. Necrosis was not found. Microscopically, the tumor showed a proliferation of spindle or ovoid cells that were intervened by a collagenous stroma. A variety of growth patterns was identified but the so-called patternless pattern was the predominant one. The spindle cells had almost no mitotic figures, and there was very little or no nuclear atypia. Immunohistochemical stains showed a strong reactivity for CD34 and a focal reactivity for bcl-2. The ultrastructure of the tumor cells showed mesenchymal-myofibroblastic traits.
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KEYWORD
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Solitary Fibrous Tumor, Urinary Bladder, CD34
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