The basic principle of Mohs microscopically controlled surgery is that the entire skin cancer is removed without taking any more normal skin than is absolutely necessary. This approach offers the highest cure rate available, usually 98-99%.
The Mohs technique is named after Dr. Frederick Mohs who in the 1940’s developed this more precise method of removing skin cancers. Originally, zinc-based chemicals were applied to the skin, and the entire surgical procedure took several days. Over the years, this method has now been refined to the point where the skin cancer is removed and the tissue is immediately examined under a microscope to look for any remaining evidence of tumor.
Because Mohs surgery requires specially trained personnel and requires more intricate and precise methods, it can be time consuming and is reserved only for certain cases. Some of the most common indications are:
Cancer located on a body structure that is so important that one wishes to remove only the diseased tissue and preserve all other normal skin.
Cancer has been previously treated and has recurred.
The affected area is not effectively curable with other methods.
Cancers occurring in immuno-compromised patients (kidney, heart, lung, or other solid organ transplant recipient) and patients on medications that suppress the immune system.