When is Mohs surgery recommended for basal cell carcinoma?

Basal cell carcinoma is a skin cancer that can extend into nearby tissue. Mohs surgery removes the visible tumour in stages, checking each layer under a microscope before taking more tissue. This helps the surgeon map the edges and limit removal of unaffected skin when that approach is appropriate.

The recommendation depends on the tumour's site, size, borders, subtype, whether it has returned, and the condition of the surrounding skin. Lesions near the eyes, nose, lips, ears or other functionally important areas may need particularly careful planning. A pathology report and examination guide the decision.

Bring your biopsy or pathology information, medication list and details of previous skin cancer treatment. Ask whether the lesion needs further biopsy information, what reconstruction might be needed, and how wound care will work. Read about [Basal Cell Carcinoma](/conditions/basal-cell-carcinoma/) and [Mohs Surgery](/treatments/surgical-dermatology/mohs-surgery/) before your consultation.

Arrange prompt dermatology review for a sore that does not heal, bleeds easily, repeatedly crusts, develops a pearly edge or changes in size or appearance. These signs do not diagnose cancer, but they deserve examination. After surgery, seek advice for bleeding that does not settle with firm pressure, increasing redness, pus, fever or worsening pain.

Ask what features make Mohs suitable, whether another treatment could work, how much tissue may be removed, whether repair is expected, and what the pathology check will show. Discuss anaesthetic, wound care, activity limits, scar management and follow-up.