Fig. 2

Nephroureterectomy specimen showing a solid tumor measuring 20 × 13 mm with a yellowish->white cut surface (A: black arrow). The pathological findings showed interlacing fascicular growth of spindle cells (B) [hematoxylin and eosin (HE) ×100]. Immunohistological findings showing positive staining for α-smooth muscle actin (SMA) (C) and h-caldesmon (D), and negative staining for human melanin black (HMB) 45 (E) (×100)