Study on hepatocelluar carcinoma-associated hepatic arteriovenous shunt using multidetector CT

Table 1 MDCT findings of earlier enhancement and stronger opacification of portal veins and hepatic veins and their relations with shunting types and degrees of HAVS

MDCT findings	Shunting patterns			Shunting degrees
	Central	Peripheral	Mixed	Severe	Moderate	Mild
Earlier enhancement of MPT and/or the first order branches than that of SMV or SV	30	0	1a	31	0	0
Stronger opacification of MPT and/or the first order branches than that of SMV or SV	18	0	0	11	7	0
Earlier enhancement of the second order and smaller branches of PV than that of MPT	0	4	0	0	0	4
Stronger opacification of the second order and smaller branches of PV than that of MPT	0	3	0	0	0	3
Earlier enhancement and stronger opacification of HV, approaching density of enhanced aorta	1b	0	0	1b	0	0

a: mixed HAPVS, with transient patchy enhancement peripheral to HCC foci at late hepatic arterial phase at the same time. b:HAHVS + HAPVS, combined with earlier enhancement of main portal trunk and the first order branches than that of superior mesenteric vein. MPT = main portal trunk, SMV = superior mesenteric vein, SV = splenic vein, HV = hepatic vein.