107894.fig.004a
(a)
107894.fig.004b
(b)
Figure 4: (a) Biopsy specimen of the proximal left femur of a 69-year-old Caucasian male with diagnosis fibroblastic osteosarcoma (200x), H.E. (b) same patient, invasive medium- to-low differentiated urothelial carcinoma of the bladder (400x), H.E.