Fig. 5.

Histology and immunohistochemistry. ( A ) Micrograph showing diffuse spindle cell proliferation (hematoxylin and eosin ×10). ( B ) Micrograph showing nuclear Fli-1 positivity in spindle cells (immunohistochemistry Fli 1 ×20).

Histology and immunohistochemistry. ( A ) Micrograph showing diffuse spindle cell proliferation (hematoxylin and eosin ×10). ( B ) Micrograph showing nuclear Fli-1 positivity in spindle cells (immunohistochemistry Fli 1 ×20).