Recurrent oral ulcer (ROU) is a common condition that significantly impacts quality of life. It is often related to systemic diseases, such as Beh?et's disease (BD), Crohn's disease, and ulcerative colitis. Treatment of ROU depends on its severity: from topical agents for mild cases to systemic agents, such as corticosteroids, azathioprine, or other immunosuppressants for severe cases. Recently, good results have been reported with infliximab in refractory ROU. However, the optimal dosage and treatment duration have not been determined and the cost and potential side effects should be considered. We report on four patients who received a single-dose infliximab for refractory ROU. Two patients had refractory ROU with no underlying disease; one of them had soft palate perforation accompanied by severe oral ulcers. The two other patients had ROU of BD without major organ involvement. All patients received a single infusion of infliximab and an additional infusion was given on demand in one patient. Infliximab showed a rapid, good response in three patients and was also effective in improving the acute inflammation in the perforation of the soft palate, which had been resistant to conventional therapies. These effects diminished over a few weeks, but the ROU were tolerable and it was not necessary to increase steroids or add another medicine for about 1 year. We suggest that a single infusion of infliximab can be considered for refractory ROU.
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