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NCI Dictionary of Cancer Terms

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Mohs surgery  listen  (moze SER-juh-ree)

  A surgical procedure used to treat skin cancer. Individual layers of cancer tissue are removed and examined under a microscope one at a time until all cancer tissue has been removed. Also called Mohs micrographic surgery.

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Mohs surgery; drawing shows a visible lesion on the skin. The pullout shows a block of skin with cancer in the epidermis (outer layer of the skin) and the dermis (inner layer of the skin). A visible lesion is shown on the skin’s surface. Four numbered blocks show the removal of thin layers of the skin one at a time until all the cancer is removed.