The lateral borders of the tongue in this 35-year old male patient exhibit homogeneous but flaky white areas that are mostly well demarcated. Ulceration or erythema are missing. Upon further questioning the patient revealed a habit of rubbing and biting his tongue.
Notes: The symmetric aspect of the lesion on both tongue borders, and a clear history of trauma suggests a frictional etiology. The dentition should be careful examined for any sharp cusps and a soft bit guard is recommended. Any systemic causes such as immunosuppression should be excluded by appropriate tests.
[Photo supplied by Prof M. Bornstein]