Mohs chemosurgery

a technique for removal of skin tumors with a minimum of normal tissue, by prior necrosis with zinc chloride paste, mapping of the tumor site, and excision and microscopic examination of frozen section of thin horizontal layers of tissue, until all of the tumor is removed. More recently, the preliminary step of chemical necrosis has been omitted. SYN: microscopically controlled surgery, Mohs micrographic surgery, Mohs surgery.