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This white plaque forms on the lower lip after years of sun exposure. This is felt to be a premalignant lesion.


A white plaque forms on the lower lip. The edge closest to the oral cavity is usually well-defined whereas the edge closest to the skin fades out gradually. The clinician should palpate the lesion to make sure there is no underlying induration or nodule. If any is present, a biopsy should be performed to exclude a squamous cell carcinoma.


The lesion should be frozen with liquid nitrogen. If it does not resolve, it should be biopsied. The patient should be instructed to protect the lower lip from chronic sun exposure and to return anytime the lip is not normal. The lip deserves special surveillance as lip SCCs more frequently metastasize.

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