Mohs Surgery vs. Traditional Skin Cancer Removal: What Is the Difference?

Medically reviewed by the medical team at Legacy Dermatology

Key Points

  • Mohs micrographic surgery removes skin cancer layer by layer while checking tissue margins in real time, making it the most precise surgical option available.
  • Traditional wide local excision removes the tumor plus a surrounding margin of healthy tissue in a single procedure done in a standard surgical setting.
  • Mohs surgery has the highest cure rates for common skin cancers, typically exceeding 99 percent for first-time basal cell carcinoma.
  • The best treatment option depends on factors like cancer type, tumor size, location on the body, and whether the cancer has returned.
  • Both procedures are performed under local anesthesia and are considered outpatient surgeries.
  • Legacy Dermatology in Algonquin, IL offers Mohs micrographic surgery and can help you understand which approach is right for your specific situation.

If you or someone you love has been diagnosed with skin cancer, the first question that usually comes up is: "What happens next?" For many patients, surgery is part of the answer. But not all skin cancer surgeries are the same, and understanding how they differ can make a real difference in how confident you feel going into treatment.

Two of the most common surgical approaches are Mohs micrographic surgery and traditional skin cancer removal, also called wide local excision. Both are effective, but they work differently and are suited to different situations. This post breaks down exactly what each procedure involves so you can have a more informed conversation with your dermatologist.

What Is Mohs Micrographic Surgery?

Mohs surgery was developed in the 1930s by Dr. Frederic Mohs and has been refined over the decades into one of the most effective treatments for certain skin cancers. The defining feature of this technique is that the surgeon removes tissue and examines it under a microscope in real time, right in the office, before removing the next layer.

Here is how a Mohs procedure typically works:

  • The area is numbed with a local anesthetic.
  • The visible tumor is removed along with a thin layer of surrounding tissue.
  • That tissue is mapped, color-coded, and examined under a microscope.
  • If cancer cells are found at any edge, the surgeon removes only that specific area.
  • The process repeats until the tissue margins are completely clear.

Because the surgeon can see exactly where cancer cells are and remove only those areas, Mohs surgery spares as much healthy tissue as possible. This precision matters a lot on the face, ears, nose, eyelids, lips, and scalp, where even a small amount of extra tissue removal can affect function or appearance.

According to the Skin Cancer Foundation, Mohs surgery achieves a cure rate of up to 99 percent for first-time basal cell carcinoma and up to 94 percent for recurrent cases, making it one of the most effective treatments available.

What Is Traditional Skin Cancer Removal (Wide Local Excision)?

Wide local excision, sometimes called traditional excision or standard excision, is a more straightforward surgical procedure. The surgeon removes the visible tumor along with a pre-determined margin of surrounding healthy tissue in a single pass.

The removed tissue is then sent to a pathology lab, which typically returns results in several days to a week. If the margins come back clear, the surgery is considered complete. If cancer cells are found at the edge of the tissue, a second surgery may be needed to remove more.

This approach is widely used, effective for many types of skin cancer, and is performed in dermatology offices, outpatient surgery centers, and hospital settings. For tumors in low-risk locations with well-defined borders, it is often a very appropriate choice.

How Do the Two Approaches Compare?

When patients ask about Mohs versus traditional excision, the comparison usually comes down to a few key factors: cure rate, tissue conservation, time, and tumor characteristics.

Cure Rate

Mohs surgery generally offers higher cure rates, particularly for high-risk tumors, tumors on the face or hands, and cancers that have returned after previous treatment. Traditional excision has strong cure rates as well, especially for primary tumors in low-risk areas with clean borders.

Tissue Conservation

Because Mohs removes only cancerous tissue and checks margins in real time, it typically results in a smaller wound than traditional excision, which removes a fixed margin that may include healthy tissue. This can reduce scarring and preserve function in sensitive areas.

Time in the Office

Mohs surgery is done entirely in one visit, but that visit can take several hours depending on how many stages are needed. Traditional excision is usually faster on the day of surgery, but it may involve a follow-up if pathology results require additional removal.

Cost and Insurance

Both procedures are typically covered by insurance when medically necessary. Mohs surgery may have higher upfront costs, but it can reduce the likelihood of needing a second surgery, which matters both financially and medically.

When Is Mohs Surgery the Better Choice?

Mohs surgery is generally recommended when:

  • The cancer is on the face, nose, ears, eyelids, lips, scalp, hands, feet, or genitalia.
  • The tumor has poorly defined borders or has grown in an irregular pattern.
  • The skin cancer has come back after previous treatment.
  • The cancer is large or has been present for a long time.
  • The patient is immunocompromised or at higher risk for recurrence.
  • Tissue preservation is a priority for cosmetic or functional reasons.

The American Academy of Dermatology provides guidelines on Mohs indications that dermatologists use to determine appropriate candidates for this technique.

When Is Traditional Excision a Good Option?

Traditional wide local excision is often appropriate when:

  • The tumor is on the trunk, arms, or legs where tissue conservation is less critical.
  • The cancer is a primary tumor with well-defined borders.
  • The tumor type is one for which Mohs is not specifically indicated.
  • The tumor is small and the surrounding tissue margins can be reliably assessed.

For many patients with melanoma, traditional excision with specific margin guidelines is actually the standard of care, as the protocols for melanoma differ from those used for basal cell and squamous cell carcinomas.

What About Reconstruction After Surgery?

Regardless of which technique is used, larger skin cancer removals often require some form of wound closure or reconstruction. This may involve simple stitching, a skin flap using nearby tissue, or a skin graft. Mohs surgeons are typically trained in reconstruction as well, and in many cases the repair is performed the same day during the Mohs appointment.

The type of closure needed depends on the size and location of the wound. Your dermatologist will discuss options with you and help you understand what to expect for healing.

Schedule a Skin Cancer Consultation at Legacy Dermatology

If you have been diagnosed with skin cancer or have a suspicious spot that needs evaluation, the team at Legacy Dermatology in Algonquin, IL is here to help. We offer Mohs micrographic surgery and work closely with each patient to determine the most appropriate treatment approach based on tumor type, location, and individual health history.

Legacy Dermatology

2230 Huntington Drive N, Unit C-1

Algonquin, IL 60102

(847) 603-4146

Schedule your appointment online at https://www.mylegacydermatology.com/contact-us

Frequently Asked Questions About Mohs Surgery vs. Traditional Skin Cancer Removal

Is Mohs surgery more effective than traditional excision?

For high-risk skin cancers, especially those on the face or that have recurred, Mohs surgery generally offers higher cure rates. Traditional excision is also very effective for appropriate candidates. The best option depends on the specific tumor and its location.

Does Mohs surgery leave less scarring than traditional excision?

Because Mohs removes only cancerous tissue, it often results in a smaller wound. However, scarring depends on the wound size, location, and type of closure used. Your surgeon will discuss what to expect based on your individual case.

How long does Mohs surgery take?

Mohs surgery is done in stages and can take several hours. Most patients come in expecting to spend most of the day, though some cases are completed more quickly. Traditional excision is typically done in a shorter appointment.

Is Mohs surgery painful?

Both procedures use local anesthesia, so you should not feel pain during the surgery. Some discomfort, swelling, and tenderness during healing is normal. Your provider will give you instructions for managing recovery at home.

Can Mohs surgery be used for melanoma?

Mohs surgery is not typically the standard of care for invasive melanoma. It is primarily used for basal cell carcinoma and squamous cell carcinoma. For melanoma, wide local excision with specific margins is usually recommended, sometimes combined with sentinel lymph node biopsy.

What type of skin cancer is Mohs surgery used for most often?

Mohs surgery is most commonly performed for basal cell carcinoma and squamous cell carcinoma. These are the most frequently diagnosed skin cancers and respond well to this technique, especially when they appear on the face or in other sensitive areas.

Will my insurance cover Mohs surgery?

Mohs surgery is usually covered by health insurance when it is medically indicated. Coverage varies by plan, and your dermatology office can help you understand your benefits before scheduling. Contact your insurance provider or our office for more information.

Frequently Asked Questions About Legacy Dermatology

Does Legacy Dermatology perform Mohs micrographic surgery?

Yes. Legacy Dermatology offers Mohs micrographic surgery for appropriate skin cancer cases. Our team evaluates each patient individually to determine the most effective treatment approach.

Where is Legacy Dermatology located?

We are located at 2230 Huntington Drive N, Unit C-1, Algonquin, IL 60102. We serve patients throughout the Fox River Valley area, including Algonquin, Lake in the Hills, Crystal Lake, and surrounding communities.

How do I schedule a skin cancer consultation at Legacy Dermatology?

You can schedule an appointment by calling (847) 603-4146 or visiting our website at https://www.mylegacydermatology.com/contact-us to book online.

What should I bring to my first skin cancer appointment?

Bring a photo ID, your insurance card, a list of current medications, and any prior biopsy or pathology reports related to the spot being evaluated. Arriving a few minutes early to complete any remaining paperwork is always helpful.

Does Legacy Dermatology treat other types of skin conditions beyond skin cancer?

Yes. Legacy Dermatology offers a full range of dermatology services, including treatment for eczema, acne, rosacea, hair loss, and a variety of cosmetic treatments. We are a comprehensive dermatology practice serving patients of all ages.

Disclaimer: The information provided on this blog is for general informational purposes only and is not intended as, and should not be considered, medical advice. All information, content, and material available on this blog are for general informational purposes only. Readers are advised to consult with a qualified healthcare professional for medical advice, diagnosis, or treatment. The author and the blog disclaim any liability for the decisions you make based on the information provided. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.