Patients who are unfit or unwilling to undergo conventional treatment for early stage esophageal cancer appear to get curative relief by having the lesions frozen to death
http://journals.lww.com/oncologytimes/Fulltext/2016/06100/Spray_Cryotherapy_Detects_Early_Esophageal_Cancer.16.aspx
Spray Cryotherapy Detects Early Esophageal Cancer