Skip to Content

Mohs Surgery

Mohs Micrographic Surgery is the most advanced and effective treatment procedure for skin cancer available today. The procedure is performed by specially trained surgeons who have completed at least one additional year of fellowship training (in addition to the physician’s three-year dermatology residency) under the tutelage of a Mohs College member.

Initially developed by Dr. Frederic E. Mohs, the Mohs procedure is a state-of-the-art treatment that has been continuously refined over 70 years. With the Mohs technique, physicians are able to see beyond the visible disease, to precisely identify and remove the entire tumor layer by layer, while leaving the surrounding healthy tissue intact and unharmed. As the most exact and precise method of tumor removal, it minimizes the chance of re-growth and lessens the potential for scarring or disfigurement.

Because the physician is specially trained in surgery, pathology, and reconstruction, Mohs surgery has the highest success rate of all treatments for skin cancer – up to 99 percent. The Mohs technique is also the treatment of choice for cancers of the face and other sensitive areas as it relies on the accuracy of a microscopic surgical procedure to trace the edges of the cancer and ensure complete removal of all tumors down to the roots during the initial surgery.


When a patient arrives at our office for Mohs surgery, all questions or concerns can be addressed during the preoperative consultation with Dr. Nalovic.

Prior to surgery, we recommend that patients get a full night’s sleep and (unless instructed otherwise) eat a light breakfast. The procedure is performed entirely on an outpatient basis in our office. The laboratory work involved in preparing the tissue for microscopic interpretation is labor-intensive and typically takes 45 minutes for each layer. Most patients bring a book or something to do while waiting on the results. We ask each patient to plan to spend the rest of the day with us, but some patients may be finished earlier.

If you are known to have cardiovascular disease and have been prescribed aspirin, Plavix, or Coumadin by your physician, it is not necessary to discontinue it, unless you are told otherwise. Be sure to check with your primary care physician prior to discontinuing any prescribed medications. A patient should also not drink any alcoholic beverages for two days before surgery and for one to two days afterwards.

The Procedure

The Mohs surgical process involves a repeated series of surgical excisions followed by microscopic examination of the tissue to assess if any tumor cells remain. Some tumors that appear small on clinical exam may have extensive invasion underneath normal appearing skin, resulting in a larger surgical defect than would be expected. It is therefore impossible to predict a final size until all surgery is complete. As Mohs surgery is used to treat complex skin cancers, approximately half of all treated tumors require 2 or more stages for complete removal.

Mohs micrographic surgery is distinct from routine surgical excision. With the Mohs technique, surgically removed tissue is carefully mapped, color-coded, and thoroughly examined microscopically by the surgeon on the same day of surgery. During this process, 100% of tissue margins are evaluated to ensure that the tumor is completely removed prior to repair of the skin defect. Mohs micrographic surgery therefore results in the highest cure rate for complex skin cancers while minimizing the removal of normal tissue.

Steps in detail:


The tumor site is locally infused with anesthesia to completely numb the tissue. General anesthesia is not required for Mohs micrographic surgery.

Stage I – Removal of visible tumor.

Once the skin has been completely numbed, the tumor is gently scraped with a curette, a semi-sharp, scoop-shaped instrument. This helps define the clinical margin between tumor cells and healthy tissue. The first thin, saucer shaped “layer” of tissue is then surgically removed by the Mohs surgeon. An electric needle may be used to stop the bleeding.

Mapping the tumor

Once a “layer” of tissue has been removed, a “map” or drawing of the tissue and its orientation to local landmarks (e.g. nose, cheek, etc) is made to serve as a guide to the precise location of the tumor. The tissue is labeled and color-coded to correlate with its position on the map. The tissue sections are processed and then examined by the surgeon to thoroughly evaluate for evidence of remaining cancer cells. It takes approximately 45 minutes to process, stain and examine a tissue section. During this processing period, your wound will be bandaged and you may leave the operative suite.

Additional stages – Ensuring all cancer cells are removed

If any section of the tissue demonstrates cancer cells at the margin, the surgeon returns to that specific area of the tumor, as indicated by the map, and removes another thin layer of tissue only from the precise area where cancer cells were detected. The newly excised tissue is again mapped, color-coded, processed and examined for additional cancer cells. If microscopic analysis still shows evidence of disease, the process continues layer-by layer until the cancer is completely removed.This selective removal of tumor allows for preservation of much of the surrounding normal tissue. Because this systematic microscopic search reveals the roots of the skin cancer, Mohs surgery offers the highest chance for complete removal of the cancer while sparing the normal tissue. Cure rates typically exceed 99% for new cancers, and 95% for recurrent cancers.


When having your surgery performed in our Alpharetta location, Dr. Nalovic will perform your reconstruction (wound closure) in our Surgical Center.  Alpharetta Mohs Surgical Center is owned and operated by Dr. Katarina Nalovic (formerly Dr. Katarina Chiller) and is a state license Ambulatory Surgical Center conveniently located adjacent to our Alpharetta office.  In this case, your nurse will simply move you from the office procedure room down our common hallway to the Surgery Center, so as to facilitate the transition. Having your surgery performed in the Ambulatory Surgery Center rather than in a regular office setting in of benefit to you, as the established standards in quality of care required to be a licensed Surgery Center are very strict and rigorous. Being licensed by the state as a Surgical Center is a testimony to our commitment to excellence.

Fellowship-trained Mohs surgeons are experts in the reconstruction of skin defects. Reconstruction is individualized to preserve normal function and maximize aesthetic outcome. The best method of repairing the wound following surgery is determined only after the cancer is completely removed, as the final defect cannot be predicted prior to surgery. Stitches may be used to close the wound in a straight line, or a skin graft or a flap may be necessary. Sometimes, a wound may be allowed to heal naturally without sutures.

Please note that when you receive your statement from procedure performed, there will be an invoice for the doctor’s fee, and invoice for the surgery center, and you may receive a separate bill from the pathology laboratory if biopsies are obtained.


Post Operative Care

Immediately after surgery and during the recovery period, there will often be the sensation of tightness as well as soreness of the treated area. The area can also become very swollen and bruised depending on the extent of involvement. A variable degree of transient numbness of the area is generally expected due to nerve involvement, but complete and permanent loss of nerve function is rare. The incision line(s) improve in appearance over the first three to six months postoperatively, especially if exposure to the sun is avoided. Because the Mohs surgeon removes only the diseased tissue and as little healthy tissue as possible, the extent of scarring (which normally occurs after any surgery) is kept to a minimum.

It is important that patients take every precaution to follow our postoperative instructions after Mohs micrographic surgery for skin cancer. Such instructions are reviewed during and after the procedure and are provided in writing with supplies.  If any post-operative concerns arise, please call our office to discuss your concerns with the medical staff or schedule for a follow up appointment.

It is also important that patients be carefully monitored on a regular basis by their primary dermatologist for skin exams. Research has shown that if there is a recurrence of skin cancer, it usually occurs within the first year. Furthermore, a significant percentage of patients who develop one skin cancer will get another within the next five years. Prevention and early detection are key.

Beverly Brauer

I have had 4 Mohs Surgery's at this facility by Dr. Nalovic. All have been on my face, so it is really important that the procedure is done well. Not only is she kind and caring, and a great surgeon....

Brenda Krolak

Dr. Navolic has the best bedside manner of any surgeon I've ever had. She is pleasant, professional and is very caring. She answered my questions, took her time, not rushed and looked at me when we talked. She completely put me in a comfortable state of mind.

Gary K.

Dr. Navolic has the best bedside manner of any surgeon I've ever had. She is pleasant, professional and is very caring. She answered my questions, took her time, not rushed and looked at me when we talked. She completely put me in a comfortable state of mind.

Candis Adams

I brought my mother in law to get her skin cancer removed today and I was so impressed with EVERYONE. Everyone works so well as a team and they make sure u are comfortable and all your questions are answered...

Chris Birdsey

I had a fantastic experience at Atlanta Skin Cancer Specialists! Dr. Nalovic and the staff explained everything they were doing during the procedure and made me feel extremely comfortable. They were also very informative and respectful. I would recommend Dr. Nalovic to anyone who needs this type of surgery.

Paola J.

I love this office! Dr N is the best surgeon in Atlanta, hands down. Not only does she do a very thorough job removing basal and abnormal cells and whatever else you may have on your fair skin, she also does a spectacular job closing up and making sure you have a minimal scar. Even on the face...

Tiffany Dorman McMillan

Thank you to Dr. Nalovic for making a stressful situation a great experience. Everyone at your office was very helpful and nice and went out of their way to make me feel comfortable.

Rick Bowens

The experience at Atlanta Skin Cancer Specialist was great! The staff was amazing and Dr. Nalovic is the best in the business! The office is very fast, efficient, and accurate and there was hardly a waiting time! I would advise anyone with Skin Cancer to have the procedure done with Dr. Nalovic!

Barbie S.

I have visited this office twice and both times was a great experience (minus having melanoma moles carved out of my back). The staff is amazing, Dr. N is warm and informative, and overall each person I interacted with made me feel comfortable while I was in a huge state of worry and stress...

Robin Litzell

Friendly, efficient, staff that works together well to make your experience as positive as it can be. My first visit was MOHS surgery. I would recommend Dr. Nalovic and her staff.

Vilda Stone Brannen

Thanks to Dr. Nalovic and her excellent and caring team for making this scary experience for our daughter and us such a "healing" experience. We are so grateful for Dr. Nalovic's expertise and caring manner. She helped bring calm and peace to all of us.

Devon McAlpin

Amazing facility, staff, service, and overall experience. I would highly recommend Dr. Nalovic to anyone.

Tod Martin

Dr. Nalovic and her team are the best. The office runs with the precision of a Swiss watch and with staff who make sure your experience is great.

Gina Versace Vreeland

The most caring and skilled surgeon and staff! Phenomenal team of dedicated professionals.

Barbie S.

The staff and doctored was great from start to finish.

Kim Parnell

Dr. Nalovic did a great job of explaining the procedure and what I could expect. Her staff was informative, kind and caring. I left with clear instructions on how to care for my wound and I am healing nicely.

Mary Parsons

They are caring, pleasant, professional and knowledgeable. Dr. Nalovic leads a great team.Everyone was so kind & caring I was happy from the time I walked in to the time I left.

Barbie S.

My 3 surgeries with Dr. Navolic have left NO scars. She is a wizard with the stitches! I find her caring, interesting, and an incredible surgeon. I hope I don't have to go in again, but if I do, I have absolute faith in her skills!