The number of serum-ANA-positive OLP and OLDR patients was significantly higher than the control group. Speckled pattern and low titer levels were the most common findings in both OLP and OLDR groups.

Elderly patients with red and white oral lesions who were taking medications had a higher serum ANA frequency than group I and the control group.

IntroductionAtenolol is commonly used by patients with hypertension, angina pectoris, or myocardial infarction. There have been reports of various adverse effects associated with the use of atenolol including bullous pemphigoid. To the best of our knowledge we present the first case report of atenolol-induced mucous membrane pemphigoid.Case presentationA 42-year-old Thai man presented to our faculty after developing generalized fiery red gingiva and ulcerations on the buccal and labial mucosa after beginning atenolol treatment. Drug-induced mucous membrane pemphigoid was diagnosed from his clinical presentation and histopathologic and direct immunofluorescence examinations, combined with a history of beginning, and withdrawal, from atenolol therapy, with the lesions resolving after the cessation of atenolol therapy.ConclusionsTo the best of our knowledge this is the first case of atenolol-induced oral mucous membrane pemphigoid reported in the literature. The observed lesions responded to withdrawal of the offending drug with complete remission. While drug-induced mucous membrane pemphigoid is an uncommon condition, dentists or other health care workers should include this condition in the differential diagnosis when a patient uses drugs suspected to be involved with drug-induced pemphigoid.

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