ESR1 and neoplasm: IHC analysis revealed the following tumor cell markers: vimentin (+), CD10 (+) (Figure 7), cyclinD1 (+) (Figure 8), CK (+, locally scattered minority), S100 (+, scattered weak), SMA (+/-, scattered), PR (+/-, partially scattered), CD117 (+/-, localized in minority), Ki-67 (+, 40%), ER (-), H-Caldesmon (-), CD163 (-), CD34 (-), CK5/6 (-), Desmin (-), HMB45 (-), p63 (-), and STAT6 (-).