ACMS Members: Please be sure to visit the Advocacy & Public Policy page to get the latest regulatory information on Mohs surgery and instructions on how to contact your legislature(s).



ACMS Members: A free mobile app is available with access to the Mohs Surgery Appropriate Use Criteria.



History of Mohs Micrographic Surgery

Mohs Micrographic Surgery is named after its founder and originator, Frederic E. Mohs, MD. As a medical student from 1929 to 1934, Dr. Mohs conducted cancer research projects while working for his mentor and zoology professor, Michael Guyer. Dr. Guyer was familiar with the preparation of frozen tissue for producing microscopic slides and had authored a book explaining how to harvest and process tissue for microscopic examination. The book focused on the need for examining, drawing and documenting discoveries that were made with the microscope.

These microscopic techniques were later used by Dr. Mohs to map out cancer around nerves, blood vessels, muscle and bone. The cancers he examined were removed by shave or saucerizing excision, a technique that removed cancer as a thin disc of tissue so that the tumor and the inflammatory white-cell infiltrate surrounding the cancer could be examined with the microscope.

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