Terminology and Facts

Mohs termed the excision of tumor tissues with the aid of a histological evaluation “microscopically controlled surgery” (MCS), and in its original meaning it is different from the “vertical serial cutting” (loaf-bread technique, see below). A horizontal serial cutting method was described by Burg and Konz in which the tumor would be cut horizontally using a microtome (see below). This has the advantage that the entire tumor can be analyzed histologically with only very small gaps.