Elevated risk of thrombophilia in agenesis of the vena cava as a factor for deep vein thrombosis

Table 2 Prevalence of combined organ anomalies

Organ or system anomalies	Patients with AIVC in this paper (n = 41)	Patients with AIVC in literature (n = 108/124; 16/124 NR ^† )	Patients with NoAIVC (n = 168)	P Value of AIVC in this paper and in literature (n = 149) vs. NoAIVC (n = 168)
Hypoplasia/aplasia of left kidney (%)	1/41 (2.4%)	3/108 (2.8%)	0/168 (0.0%)	0.042
Hypoplasia/aplasia of right kidney (%)	2/41 (4.9%)	7/108 (6.5%)	0/168 (0.0%)	0.002
Polysplenia (%)	1/41 (2.4%)	2/108 (1.9%)	0/168 (0.0%)	0.080
Preduodenal portal vein (%)	1/41 (2.4%)	1/108 (0.9%)^‡	0/168 (0.0%)	0.176
May-Thurner syndrome (%)	0/41 (0.0%)	0/108 (0.0%)	5/168 (3.0%)	0.026

AIVC inferior vena cava agenesia. NoAIVC iliofemoral DVT with involvement of inferior vena cava without AIVC. NR not reported.
^†In 16 of 124 reported cases in literature organ anomalies were not reported (NR); comparisons were calculated with 108 patients.
^‡Absence of portal vein.

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