This article is a narrative review of current treatment methods and clinical evaluation of the outcome for oral lichen planus based on published articles （Japanese and international journals） by the 2^nd OLP Working Group of the OLP Committee of the Japanese Association of Oral Medicine. The result is summarized as a statement of the task force consensus. We hope that this review article will serve as an index for evaluating clinical and pathological efficacy in clinical trials to be conducted in Japan in the future. It is necessary to determine whether the status of oral lichen planus is acute phase or chronic phase on its pathobiology, or signs and symptoms. If chronic, it is necessary to determine whether it is a chronic active phase or a chronic nonactive phase. Therefore, it is necessary to select and develop the treatment methods while clarifying whether complete cure or maintenance of chronic nonactive phase is the goal of treatment, while keeping in mind the prevention of malignant transformation.

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22q11.2 deletion syndrome is caused by deletion of the long arm 11.2 region of chromosome 22, and often has tetralogy of Fallot as the clinical manifestation of the disease. A 39-year-old woman with 22q11.2 deletion syndrome with tetralogy of Fallot visited our dental clinic for dental treatment. In cooperation with the pediatric department of the general hospital, the tooth was extracted during hospitalization while monitoring the electrocardiogram. There were no abnormal findings during and after the operation, and the patient was discharged from the hospital.

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