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Is Clinical Recurrence Required to get Mohs Micrographic Surgery?
Mohs allows for the maximal amount of tissue conservation when it comes to dermatologic cancer resections. It can be indicated for any skin cancer on the face (or any other part of the body) if resection of that tissue is likely to leave a significant scar or a scar that can alter the function of things like the eyelids. Just because you have positive margins may not mean you NEED Mohs if the treating physician feels that the resulting defect is likely to be similar or the reconstruction options will not substantially change with comparison to normal surgical resection. You should talk to BOTH the Mohs dermatologic surgeon and your planned reconstructive surgeon to get the treatment options that are best suited to your needs.
Clinical Context
Mohs micrographic surgery works by removing a thin layer of tissue and mapping it under a microscope in real time, checking the entire margin before taking the next layer. That layer-by-layer process is what sets it apart from standard excision, not whether a tumor has come back before. Recurrence is one reason a physician might recommend Mohs, since recurrent tumors can grow in irregular or unpredictable patterns, but plenty of first-time skin cancers on the face, ears, and other cosmetically sensitive areas qualify too, based on tumor type and location alone.
