[Table/Fig-5]:

Features of cases of right double inferior vena cava

Sl. No.	Name of author and year	No. of cases	Sex	Comparison of size of two IVCs. (Ventral = V Dorsal = D)	Level of confluence of the two IVCs from renal veins confluence	Drainage site of right gonadal vein	Remarks
1	Doyle et al., 1992 [19]	1	M	V > D	At the level of renal veins	NA	------
2	Meyer et al., 1998 [20]	1	NA	V > D	Caudal to renal veins	NA	Spiral CT
3	Nagashima et al., 2006[22]	5	M-2 F-3	V > D – 3 V < D – 1 V = D -1	Caudal to renal veins	V.IVC – 4 IVC -1	CT. Left common iliac vein continued as Ventral IVC crossing ventral to aortic bifurcation or right common iliac artery. Right common iliac vein continued as Dorsal IVC. No interiliac communication.
4	Senecail et al., 2004 [21]	1	F	V < D	Caudal	V.IVC	CT. VIVC continuation of LCIV. DIVC formed by RCIV with an anastomotic branch from LCIV
5	Tagliafico et al., 2007 [18]	1	M	V < D	Caudal to renal veins	V.IVC	US, CT. Venous ring encircling right common iliac artery.
6	Ng and Ng, 2009 [23]	1	F	NA	At renal veins level	NA	US, MRI. Left common iliac vein passed behind aorta and ascended as double IVC.
7	Gong et al., 2011 [24]	1	F	NA	Midsegment duplication	NA	Partial right double IVC with circumcaval ureter
8	Present Case, 2013	1	F	V > D	Caudal to renal veins	V.IVC	Ventral IVC showing Preaortic iliac venous confluence; Dorsal IVC continuation of right external iliac vein