Solitary Fibrous Tumor of the Kidney Developing Local Recurrence

Figure 2

Histological findings of the solitary fibrous tumor. The primary tumor displayed hemangiopericytomatous patterns ((a), HE ×40). Immunohistochemical staining of the primary tumor was positive for CD-34 and Bcl-2 ((b) and (c), ×40) and Ki-67 labeling index was less than 3% ((d), ×40). Cellularity was increased in the tumor that recurred at the hilar portion of the kidney (e). Immunohistochemical staining for CD-34 and Bcl-2 was positive ((f) and (g), ×40). Ki-67 labeling index was less than 15% ((h), ×40).

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