“…Moreover, lesions that would be very difficult to resect by conventional EMR from the technical viewpoint are also considered as an indication for ESD, including the lesions showing poor-or non-lifting after submucosal injection, local recurrent lesions following previous treatment, and relatively large protruded type lesions (Saito et al, 2010a;Toyonaga et al, 2010;Tajika et al, 2011;Lee et al, 2012;Kobayashi et al, 2012;Terasaki et al, 2012;Kim et al, 2013;Oka et al, 2015;Fujishiro et al, 2007;Saito et al, 2013;Matsuda et al, 2010;Yamamoto et al, 2002;Saito et al, 2001Saito et al, , 2007Tanaka et al, 2007;Tamegai et al, 2007;Hurlstone et al, 2007;Isomoto et al, 2009;Niimi et al, 2010;Saito et al, 2010b;Takeuchi et al, 2010;Uraoka et al, 2011;Probst et al, 2012;Iacopini et al, 2012;Lee et al, 2013;Xu et al, 2013;Repici et al, 2013;Rahmi et al, 2014;Białek et al, 2014;Agapov and Dvoinikova, 2014;Spychalski and Dziki, 2015).…”