Table 1.

Patient and tumor characteristics and results of immunohistochemical analyses.

Variable	Categorization	n analyzablea	%
Total (n = 174)a
Clinicopathologic data
Age at diagnosis (median, range): 69.5 years (32–92)	<70 years	87	50.0
	≥70 years	87	50.0
Sex	Female	43	24.7
	Male	131	75.3
Tumor stage (WHO 1973b)	pTa	90	51.7
	pT1	68	39.1
	pT2	13	7.5
	pT3	2	1.1
	pT4	1	0.6
Histologic grade (WHO 1973b)	G1	44	25.3
	G2	87	50.0
	G3	43	24.7
Histologic grade (WHO 2004c)	Low grade	101	58.0
	High grade	73	42.0
Adjacent carcinoma in situ	No	158	90.8
	Yes	16	9.2
Multiplicity	Solitary	124	71.3
	Multifocal	50	28.7
Growth pattern	Papillary	159	91.4
	Solid	15	8.6
Immunohistochemistry (IHC)
CD73	Score 0	80	46.0
	Score 1+	48	27.6
	Score 2+	46	26.4
Ki-67 labelling index	≤10%	108	62.1
	>10%	66	37.9

^aAll patients.

^bStaging and grading according to the 1973 WHO classification system.

^cStaging and grading according to the 2004 WHO classification system.