Korean J Urol.  2007 Jul;48(7):748-750. 10.4111/kju.2007.48.7.748.

Solitary Fibrous Tumor of the Renal Peripelvis

• Lee JH
• Lee SH
• Kim JH
• Park SH
• Park JT
• Kim SI
• Kim SJ

• KMID: 1990229
• DOI: http://doi.org/10.4111/kju.2007.48.7.748

Abstract

A solitary fibrous tumor(SFT) is a rare spindle cell neoplasm that arises most commonly in the pleura but has recently been described in various extrapleural sites. SFTs occurring in the renal pelvis or peripelvis are extremely rare, and only 3 cases have been reported. We report here on a 71-year-old woman who presented with an incidentally detected left renal mass and underwent radical nephroureterectomy under the suspicion of renal pelvis cancer. The pathological examination of the tumor revealed a SFT occurring in the renal peripelvis. The patient has no evidence of disease 1 year after the surgery. Most SFTs appear to pursue a benign course, although, because some of them have the potential to recur or metastasize, careful long-term follow-up is necessary.

Keyword

Kidney neoplasms; Renal pelvis; Immunohistochemistry; Solitary fibrous tumor

MeSH Terms

Aged
Female
Follow-Up Studies
Humans
Immunohistochemistry
Kidney Neoplasms
Kidney Pelvis
Pleura
Solitary Fibrous Tumors*

Figure

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  Fig. 1. Contrast-enhanced CT scan shows a 3x3cm sized, enhanced, well-demarcated mass in the left renal pelvis area.

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  Fig. 2. Left retrograde pyelogram demonstrates a mass extrinsically compressing infundibula between mid and lower calyx.

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  Fig. 3. Microscopically, the tumor is composed of spindle cells with patternless arrangement in a collagenous stroma (H&E, x200).

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  Fig. 4. Tumor cells show diffuse immuno-positivity for CD34 (x200).

Reference

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