Direct infusion of ethyl cyanoacrylate monomer into the viscerocutaneous tubular fistula was curative when the fistula was narrower than 5 mm in diameter. A piece of flat rubber or silicone gauze was fixed by cyanoacrylate adhesive on the cutaneous opening of the wide tubular fistula. Gradually the diameter of the fistula shrank from 10 mm or greater to 5 mm or less. Thereafter, direct infusion of ethyl cyanoacrylate monomer into the fistula was curative. Covering of mucosal lips of the labial fistula with a flat rubber piece or silicone gauze by means of ethyl cyanoacrylate monomer or dimethylpolysiloxane failed to cure the labial fistula but relieved local dermatitis, dehydration, and electrolyte imbalance preoperative ly.