Poulard J B, Shatz B, Kodner I
Endoscopy. 1985 Mar;17(2):84-5. doi: 10.1055/s-2007-1018465.
A simple method of marking polypectomy site is described. It involves submucosal injection of supravital dye via the colonoscope. It permits identification of site of pathology at the time of surgery.