Table 2. FISH analysis of recurrently amplified RTK genes.

Gene	Sample	Amplification
		DD area	WD area
DDR2	WDLPS_04T	NA	+
	WDLPS_08T	NA	++
	WDLPS_17T	NA	++
	WDLPS_18T	NA	++
	WDLPS_19T	NA	++
	DDLPS_16T	++	++
ERBB3	WDLPS_09T	NA	+
	DDLPS_09T	++	++
	DDLPS_27T	++	+
	DDLPS_33T	++	NS
NTRK1	WDLPS_14T	NA	++
	WDLPS_19T	NA	++
	DDLPS_05T	++	NS
FGFR3	DDLPS_08T	++	NS
	DDLPS_34T	++	NE
ROS1	DDLPS_01T	++	+
	DDLPS_40T	++	–

DD, dedifferentiated; WD, well differentiated; NA, not associated; NS, no sample, NE, not evaluable; “++”, positive in many tumor cells; “+”, positive in a small subset of tumor cells; “–”, negative.