Table 2.

Summary of immunohistochemical and FISH studies

Case	IHC profile of myoepithelial cells	IHC profile of duct-like component	FISH
1	Pos: CK7, p63, SMA, S100, SOX10, PLAG1	Pos: CK7, TTF-1, Napsin A (PLAG1-negative)	PLAG1+
2	Pos: AE1/AE3, p40, calponin, S100, SMA (focal) Neg: PLAG1	Pos: AE1/AE3, TTF-1, focally for mucicarmine	EWSR1−, FUS−
3	Pos: S100, SMA, calponin	Pos: EMA, CK7, TTF-1
4	Pos: AE1/AE3, p63	Pos: AE1/AE3, TTF-1
5	Pos: p40, calponin, S100, SMA	Pos: CAM5.2, CK7, TTF-1	MAML2−, CRTC1−, HMGA2−, PLAG1−, EWSR1−, and FUS−
6	Pos: : AE1/AE3, p63, S100, CK5/6, actin	Pos: CAM5.2, CK7, TTF-1
7	Pos: p63, weakly positive to negative AE1:AE3	Pos: AE1/AE3, TTF-1, Napsin A

SMA: smooth muscle actin