Korean J Urol.  2009 Jan;50(1):89-91. 10.4111/kju.2009.50.1.89.

Solitary Fibrous Tumor of Kidney

  • 1Department of Urology, Wonkwang University School of Medicine, Iksan, Korea. seraph@wonkwang.ac.kr
  • 2Department of Pathology, Wonkwang University School of Medicine, Iksan, Korea.
  • 3Department of Radiology, Wonkwang University School of Medicine, Iksan, Korea.


Solitary fibrous tumors (SFTs) are a rare spindle-cell neoplasm originating from mesenchymal fibroblast-like cells. Although they generally arise from submesothelial connective tissue in the pleura, many other locations have also been described, including the mediastinum, upper respiratory tract, orbit, salivary gland, thyroid, and prostate. SFT of the kidney, however, has rarely been described, and only 1 case has been reported in Korea. A 53-year-old female visited our hospital for abdominal pain, and abdominopelvic computed tomography showed a heterogeneous well-enhanced mass in the renal pelvis. She was treated with a laparoscopic radical nephroureterectomy, which revealed an SFT of the kidney.


Solitary fibrous tumors; Kidney

MeSH Terms

Abdominal Pain
Connective Tissue
Kidney Pelvis
Middle Aged
Respiratory System
Salivary Glands
Solitary Fibrous Tumors
Thyroid Gland


  • Fig. 1 Abdominal computed tomography showing a 4.5×4.5cm heterogeneous enhanced round mass in the left renal pelvis.

  • Fig. 2 (A) Cut section showing a well-circumscribed, whitish, soft mass in the renal hilum, with no invasion to the pelvis or renal capsule. (B) Lower power view showing alternating hypercellular and hypocellular areas, represented by typical features of solitary fibrous tumors (H&E, ×40). (C) High power view showing abundant infiltrated CD34-positive tumor cells by immunohistologic staining (×200).


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