Table 2. Effect of race on the risk of second primary cancers in UTUC.

Site of second malignancy	White			Black			Others
	O	SIR		O	SIR		O	SIR
All sites	2,940	2.41*		131	3.00*		228	3.19*
All solid tumors	2,798	2.61*		123	3.13*		223	3.50*
Urinary system
Ureter	46	19.67*		2	64.68*		7	41.09*
Urinary bladder	1,375	16.22*		60	43.51*		124	39.89*
Renal pelvis	33	9.49*		0	0.00		3	14.54*
Penis	6	4.27*		0	0.00		0	0.00
Kidney	39	1.40		1	0.87		6	3.87*
Prostate	284	1.14*		18	1.64		15	1.10
Digestive system
Splenic flexure	9	2.21*		2	9.91*		0	0.00
Cecum	50	1.79*		0	0		2	1.72
Transverse colon	20	1.79*		1	2.64		0	0.00
Colon excluding rectum	170	1.47*		6	1.45		13	1.84
Large intestine, NOS	10	1.37		0	0		3	7.91*
Stomach	22	0.92		1	0.76		9	2.30*
Descending colon	6	0.91		0	0		4	7.38*
Respiratory system
Lung and bronchus	384	2.03*		20	2.73*		20	1.74*
Nervous system
Brain	21	1.84*		0	0.00		1	2.37

*, P<0.05. UTUC, upper-tract urothelial carcinoma; O, observed number of cases; SIR, standardized incidence ratio (ratio of observed to expected number of second malignancies); NOS, not otherwise specified.