What is Mohs surgery?

An effective treatment for basal cell cancers.

Reviewed by Howard E. LeWine, MD, Chief Medical Editor, Harvard Health Publishing

cropped photo of the gloved hands of a surgeon using a scalpel to make an incision on the back of a person's hand, preparing to remove a basal cell cancer

Mohs micrographic surgery is often used to remove basal cell cancers. During Mohs surgery the tumor is shaved away in thin layers, one layer at a time. Each layer is checked immediately under a microscope.

This allows the surgeon to preserve as much healthy skin as possible while removing all of the cancer and a thin margin of healthy skin. This surgery is a highly effective treatment for basal cell cancer and often has very good cosmetic results.

Basal cell cancers form in the epidermis, the protective, outermost layer of our skin. The cancerous cells invade surrounding tissues, usually forming a painless pearly bump.

illustration showing how a basal cell carcinoma looks under the skin

 Illustration by Michael Linkinhoker

Print This Page

Disclaimer:

As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Please note the date of last review or update on all articles.

No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician.

Free Healthbeat Signup

Get the latest in health news delivered to your inbox!

Sign Up
Harvard Health Publishing Logo

Thanks for visiting. Don't miss your FREE gift.

25 Gut Health Hacks is yours absolutely FREE when you sign up to receive health information from Harvard Medical School.

Sign up to get tips for living a healthy lifestyle, with ways to lessen digestion problems…keep inflammation under control…learn simple exercises to improve your balance…understand your options for cataract treatment…all delivered to your email box FREE.

Harvard Health Publishing Logo

Stay on top of latest health news from Harvard Medical School.

Plus, get a FREE copy of the Best Diets for Cognitive Fitness.

Harvard Health Publishing Logo

Stay on top of latest health news from Harvard Medical School.

Plus, get a FREE copy of the Best Diets for Cognitive Fitness.