Frederic E. Mohs
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Frederic Edward Mohs (March 1, 1910 – July 2, 2002), a physician and general surgeon, developed the Mohs micrographic surgery (MMS) technique in 1938 to remove skin cancer lesions while still a medical student at the University of Wisconsin–Madison. The Mohs procedure is considered the best method for treating certain types of skin cancer, especially of the head and neck, with cure rates approaching 100%.
Mohs was born in Burlington, Wisconsin. His father died when he was 3 months old, and the family moved to Madison, where his mother ran a boarding house. After initially considering a career as a radio engineer, he switched to medical studies in college. Mohs began developing his treatment in the 1930s, experimenting on rats, puppies, and other animals. The breakthrough came when he discovered that applying a combination zinc chloride and bloodroot paste to malignant rat skin tissue allowed it to be removed surgically and examined under a microscope. He treated his first human patient on June 23, 1936. Mohs, who spent his working life at the University of Wisconsin, was a tireless advocate for the surgical procedure he had devised and taught it to doctors from all over the world.
In 1943 Mohs married Mary Ellen Reynolds, who died in 1995. Mohs died at his home in Madison, Wisconsin on July 2, 2002 at the age of 92. He is survived by two sons, Frederic and Thomas, of Madison; and a daughter, Jane Shimming of Jupiter, Fla.
Mohs first tried to publish his findings and encouraged surgeons to learn the procedure. This was largely unsuccessful, as many surgeons were not comfortable learning skin pathology and laboratory techniques. Dermatologists, who are well trained in dermatopathology, and who treat skin cancers on a daily basis, quickly embraced the procedure. Today, most Mohs procedures are performed by dermatologists, although a small number of plastic surgeons, otolaryngologists, and pathologists are also practicing and using the procedure as well.
Mohs' technique was later modified by Perry Robins in the 1970s, using fresh-tissue frozen histology. Rather than using the anesthetic Mohs paste, local anesthetic is used. The fresh skin specimen is then mounted on a cryostat, and frozen sections are examined instead of the Mohs paste-fixed sections. This method is now commonly referred to as Mohs surgery, and occasionally chemosurgery, in reference to the Mohs paste that Mohs initially used.
- Obituary, The Wisconsin State Journal (Madison, WI), July 2, 2002
- "Frederic Mohs, 92, Inventor Of Cancer Surgery Technique" - New York Times Obituary, July 5, 2002
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