Oral Squamous‐Cell Carcinoma within a White‐Sponge Nevus

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Abstract
A 59-year-old woman had thick plaques of leukoplakia on the tongue bilaterally. The condition was initially diagnosed by biopsy as a white-sponge nevus. A second biopsy of a suspicious area on the right side showed squamous-cell carcinoma two years later. It is speculated that prednisone therapy for steroid-dependent intrinsic asthma may have caused a loss of "immunologic surveillance," which permitted development of malignancy in a previously benign condition.