“…Moreover, when using the less frequent ethanol aspiration approach, the ethanol is left in the cavity for 2 to 10 min 8,14,17 . The amounts of ethanol administered during PEI procedures ranged from 36% to 100% of the initial cyst volume in various studies, such as those by Bennedbaek 5,8,14,15,[18][19][20] ). Although most authors do not recommend to administer a single dose of more than 10 mL of ethanol, Kim DW et al injected amounts equal to 100% of the volume of cysts smaller than 20 mL, that is, up to 20 mL of absolute ethanol and, in one case of an extremely large 135-mL cyst, even as much as 30 mL of ethanol 14 .…”