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About the procedure Excision of Melanoma – Wide local excision with margins based on guidelines

Our Philosophy on Melanoma Excision

At AR Plastic Surgery, the surgical treatment of melanoma is carefully planned with a focus on accuracy, safety, and clear communication. Melanoma is a serious type of skin cancer that can spread if not treated early, so timely and appropriate surgery is important. We follow current national and international guidelines for wide local excision, adjusting the margins based on how deep the melanoma is. This approach helps reduce the risk of the melanoma returning near the original site.

The surgeons who operate at AR Plastic Surgery have experience in the management of primary melanoma. Each case is assessed individually, ensuring that the treatment plan reflects the lesion’s location, characteristics, and depth of invasion. Where appropriate, a multidisciplinary approach may be considered, particularly for thicker melanomas or those with high-risk features.

Our philosophy is built on clear communication and patient education. We ensure patients understand their diagnosis, the reasoning behind wide local excision, the surgical margins recommended, and the steps involved in wound management and surveillance. We aim to provide a comprehensive understanding of the surgical process and its role in long-term melanoma control.

Understanding Melanoma and the Role of Wide Local Excision

Melanoma is a type of skin cancer that starts in pigment-producing cells called melanocytes. It can appear on its own or develop from an existing mole. If not treated early, it can spread to the lymph nodes or other parts of the body. A biopsy is used to confirm the diagnosis and measure how deep the melanoma is in the skin—this depth, known as Breslow thickness, helps determine how much surrounding tissue should be removed during surgery and guides further treatment planning.

Wide local excision is performed following a confirmed diagnosis of melanoma. The purpose of this procedure is to remove any remaining melanoma cells at the original biopsy site along with a margin of normal surrounding tissue. This approach helps to reduce the risk of local recurrence and provides tissue for further pathological assessment. The width of the excision margin is determined by the thickness of the melanoma, following evidence-based clinical guidelines.

Wide local excision is distinct from a diagnostic biopsy. It is a therapeutic procedure aimed at complete local clearance of the disease. In some cases, particularly for intermediate or thick melanomas, sentinel lymph node biopsy may also be considered. This decision is made during pre-operative planning based on staging and referral guidelines.

Guideline-Based Excision Margins for Melanoma

At AR Plastic Surgery, we follow current clinical practice guidelines when planning wide local excision. These margins are determined according to the Breslow thickness of the melanoma:

  • Melanoma in situ: 5–10 mm margin
  • ≤1.0 mm thickness: 1 cm margin
  • 1.01–2.0 mm thickness: 1–2 cm margin
  • 2.01–4.0 mm thickness: 2 cm margin
  • > 4.0 mm thickness: 2 cm margin

These margins are measured from the edge of the original lesion or biopsy scar. The surgery usually removes the full thickness of the skin down to the layer just above the muscle. Removing more than the recommended margin is only considered if the lab results show that melanoma cells may still be present after the first surgery.

If the area is too large to close with stitches alone, reconstructive options such as a skin graft or local flap are planned. The choice depends on the location of the melanoma and the amount of nearby skin available. These options are explained to the patient before the surgery.

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What to Expect During the Day of the Procedure

Patients undergoing wide local excision are welcomed into the surgical facility and supported by the clinical team through the final preparation steps. This includes reviewing the surgical plan, confirming the planned excision margins, and marking the site as needed. Any final questions or concerns are discussed to help the patient feel prepared before the procedure begins.

Wide local excision is performed under either local or general anaesthesia, depending on the size and location of the lesion and whether additional procedures, such as sentinel lymph node biopsy, are being performed. For lesions on the limbs or trunk, local anaesthesia may be sufficient. For larger lesions or those on the face, scalp, or feet, general anaesthesia may be advised.

During the procedure, the area where the melanoma was found—along with some surrounding skin—is removed based on recommended safety margins. The removed tissue is checked under a microscope to make sure all the melanoma has been taken out. If the wound is too large to close with stitches alone, a skin graft or local flap may be used to cover it. Dressings are then applied, and patients are given clear instructions on how to care for the wound at home.

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Disclaimer: The outcomes shown are only relevant for this patient and do not necessarily reflect the results other patients may experience, as results may vary due to many factors, including the individual’s genetics, diet and exercise. Some images may have the patient’s tattoos, jewellery or other identifiable items blurred to protect patient identities.

Aftercare and Recovery

After wide local excision, patients are given specific instructions based on how the wound was closed. If the wound was closed with stitches, patients are advised to avoid stretching the area and to keep the dressing in place until the follow-up appointment. If a skin graft or flap was used, extra care may be needed, including more frequent dressing changes and earlier follow-up to monitor healing.

Follow-up visits are arranged to check how the wound is healing and to go over the results from the tissue examination. If the melanoma has been fully removed, patients may be referred back to their general practitioner or dermatologist for regular skin checks. If the melanoma was thicker or showed other high-risk features, further tests or referrals may be discussed.

Recovery time varies depending on how much tissue was removed and the method used to close the wound. Stitches are usually taken out within 1 to 2 weeks. Patients are advised to avoid heavy lifting or strenuous activity during this time. In some cases, scar care treatments—such as silicone dressings or pressure therapy—may be recommended.

Potential Risks

All surgical procedures involve risks. The potential complications associated with wide local excision of melanoma include:

  • Infection
  • Bleeding or haematoma
  • Wound breakdown or delayed healing
  • Scarring
  • Skin graft or flap complications (if used)
  • Numbness or altered sensation around the excision site
  • Need for further surgery if margins are not clear
  • Anaesthetic-related complications (if general anaesthesia is used)

These risks are explained to the patient before surgery during the consultation. Steps are taken to help reduce the chance of complications, such as careful surgical technique, suitable wound closure, and clear instructions for care after the procedure. The excised tissue is closely examined to check that all of the melanoma has been taken out.

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