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Mohs Micrographic Surgery

Precision in the treatment of skin cancer

Mohs Micrographic Surgery can be considered the most refined, precise and effective technique for the treatment of the most frequent types of skin cancer. This surgical technique, offers the highest cure rate in the excision of non-melanoma skin cancers.

With this procedure, it is possible to identify and remove the entire tumour, while preserving healthy skin around the lesion. This technique consists of removing the cancer from the skin, layer by layer and examining each one under the microscope, until a free margin is obtained, that is, until the tumour has been completely removed (the level of precision and accuracy can reach 98%). This precision is possible since during the surgical procedure practically 100% of the margins are analysed by microscope. Once the free margin is reached, the wound (resulting from the extraction of the tumour) is reconstructed.

The main advantage of Mohs Micrographic Surgery when compared to conventional surgery is related to the microscopic control of the margins of the tumour during surgery. Removal of the entire tumour without aggression or extraction of normal skin is ensured. In conventional surgery, the tumour is removed with safety margins and sent to pathological anatomy. The result is usually received within 1-2 weeks. The risk of some cancerous residue remaining may exist and is definitely higher in relation to Mohs surgery, as removal of the tumour is carried out by what can be visualized by the dermatologist. 

Mohs surgery is indicated for:

  • Basal cell carcinoma with an increased risk of recurrence;
  • Squamous cell carcinoma (or squamous cell);
  • Dermatofibrossarcoma protuberans (DFSP);
  • And some other rare skin tumours.

Dr Tiago Mestre is one of the few Portuguese Dermatologists who performs Mohs surgery, whose skills he acquired at Newcastle Upon Tyne Hospitals (United Kingdom). Dr Tiago Mestre is a member of the American College and the European Mohs Surgery Society.


Dr. Tiago Mestre                                           



17, March 2021