Malignant Solitary Fibrous Tumor of the Kidney: Report of the First Case Managed with Interferon

Table 2

Clinicopathologic features and outcomes of the 49 cases reported with solitary fibrous tumors of the kidney.

Median age in years (range)	51 (4–85)
Sex
Male	14
Female	28
Unknown	7
Location
Left kidney	23
Right kidney	17
Bilateral	1
Unknown	8
Site
Kidney	33
Renal capsule	6
Peripelvis	3
Pelvis	1
Unknown	6
Medium size in cm (range)	7,6 (2–20)
Histology
Benign	42
Malignant	7
Treatment
Tumor resection	2
Nephrectomy	41
Unknown	6
Subcutaneous interferon	1
Outcome
No evidence of disease	25
Metastasis	4
Unknown	20