Fig. 6

Graphic illustration of the Kiyosue classification of GV [21]. a Classification based on the inflow pathway(s). Type 1 (i) refers to a single afferent vein for the varices, while type 2 (ii) refers to multiple afferent vessels contributing to the varix. Type 3 is like type 2 with the addition of small afferent vein(s) in direct continuity with the outflow tract. b Classification based on drainage pathway. Type A consists of a gastrorenal shunt as the sole drainage. Type B describes the additional presence of small portosystemic collaterals; type C describes the presence of both a gastrorenal and direct gastrocaval shunt; type D consists of multiple small portosystemic collaterals as the drainage pathways without any recognisable shunt