Table 2.

Published series with more than 20 complex renal cysts with pathological findings

References	Modality	BI	BII	BIIF	BIII	BIV	Total
Before introduction of BIIF
Brown et al. (1989) [23]	CT	0/2	0/4	–	3/12	4/6	24
Aronson et al. (1991) [24]	CT	–	0/4	–	5/9	7/7	20
Wilson et al. (1996) [25]	CT	0/7	4/5	–	4/4	6/6	22
Cloix et al. (1996) [17]	CT	1/2	1/7	–	4/13	7/10	32
Siegel et al. (1997) [3]	CT	0/22	1/8	–	5/11	26/29	70
Bielsa et al. (1999) [26]	CT	–	1/8	–	7/9	3/3	20
Koga et al. (2000) [19]	CT	0/11	1/2	–	10/10	12/12	35
Curry et al. (2000) [27]	CT	0/4	0/11	–	29/49	18/18	82
Limb et al. (2002) [28]	CT	–	3/28	–	8/29	–	57
Overall number		1/48	11/77	–	75/146	83/91	362
Malignant vs. benign
Incidence of malignancy (%)		2 %	14 %	–	51 %	91 %
References	Modality	BI	BII	BIIF#	BIII	BIV	Total
After introduction of BIIF
Isreal et al. (2003) [29]	CT	–	–	–	9/21	16/16	37
Isreal et al. (2003) [6]	CT	–	–	7/42	–	–	42
Harisinghani et al. (2003) [30]	CT	–	–	–	17/28	–	28
Isreal et al. (2004) [31]	CT and MRI	–	–	–	14/14	6/6	20
Spaliviero et al. (2005) [7]	CT		2/9	1/4	6/12	19/21	46
Quaia et al. (2008) [8]	CT and CEUS	–	0/3	0/6	5/13	18/18	40
O’Malley (2009) [9]	CT	–	–	5/74	27/33		107
Gahr et al. (2009)* [10]	CT	–	–	7/50	–	–	50
Song et al. (2009) [11]	CT	–	3/26	0/3	21/38	32/37	104
Peng et al. (2010) [4]	CT and CEUS	0/2	0/3	–	5/6	12/13	24
Kim et al. (2010) [12]	CT	0/34	3/22	3/10	19/26	28/33	125
Weibl et al. (2011) [22]	CT and MRI	–	0/2	2/3	15/27	30/39	71
Pinheiro et al. (2011) [20]	CT				5/15	19/22	37
You et al. (2011) [32]	CT	–	–	–	22/39	31/36	75
Our study	CT	–	–	2/38	–	–	38
Overall number		0/36	8/65	27/230	165/272	211/241	844
Malignant vs. benign
Incidence of malignancy (%)		0 %	12 %	12 %	61 %	88 %

*BII and BIIF lesions were pooled

^#BIIF cysts that progressed and histologically were verified as malignant