Figure 4.

Immunohistochemical findings. A. The myoid-appearing spindle tumor cells show diffuse and strong positivity for SMA (immunostaining, ×400). B. The primitive-appearing tumor cells are focally positive for SMA (immunostaining, ×400). C. The myoid-appearing spindle tumor cells show an increased Ki-67 labeling index (up to 7%) (immunostaining, ×400). D. The primitive-appearing tumor cells display low Ki-67 labeling index (up to 1%) (immunostaining, ×400).

Kim et al. Diagnostic Pathology 2013 8:90   doi:10.1186/1746-1596-8-90
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