The main purpose of this study will be to two-fold; firstly to determine whether the use of a
Captivator tissue cassette has an effect on the preservation of tissue histology (minimizing
artifactual curling) , and secondly to determine whether the use of a intraprocedural
cassette is practical. The investigators believe that this will greatly aid in elucidating
the best technique for optimizing performance of EMR for esophageal lesions.