Table 4.

DNA copy number variation of FGFR3 by tissue type.

Tissue	FGFR3 gain	FGFR3 loss
Normal bladder tissue (N = 37)	0	0
Primary tumor (N = 121)	1 (0.8%)	1 (0.8%)
Metastasis (N = 33)	1 (3.0%)	4 (12.1%)
FGFR3 mutant (N = 6)	1 (16.7%)	0