Abstract
A 51-year-old man complained of oral roughness and pain. At the age of 49 years, he was admitted for 8 months for bipolar emotional disorder. Oral administration of lithium carbonate was started. Extensive, hemorrhagic, erythema-mixed white lace-like patches were noted on the lip, buccal mucosae, and lingual margins. On biopsy, all lesions were consistent with oral lichen planus. A drug lymphocyte stimulation test showed a positive reaction to lithium carbonate. Blood examination revealed marked increases in the peripheral blood levels of antinuclear antibodies. To relieve the symptoms, the systemic administration of prednisolone was performed while continuing the lithium carbonate.
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