Surgical Approaches to Supradiaphragmatic Segment of IVC and Right Atrium through Abdominal Cavity during Intravenous Tumor Thrombus Removal

Table 1

Localization of the phrenic vein insertions.

IVC level	Localization of insertions
	The right anterior half circle of the IVC		The left anterior half circle of the IVC		The right posterior half circle of the IVC		The left posterior half circle of the IVC		Total
	(N)	(%)	(N)	(%)	(N)	(%)	(N)	(%)	(N)	(%)
The supradiaphragmatic IVC	5	4.3	2	1.8	0	0	0	0	7	6.1
The fusion of the IVC with the diaphragm and below the diaphragm	58	50.4	42	36.5	7	6.1	1	0.9	108	93.9
Total	63	54.8	44	38.3	7	6.1	1	0.9	115	100