1 Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College/Chinese Academy of Medical Science, Beijing, China.
2 Key Laboratory of Gut Microbiota Translational Medicine Research, Chinese Academy of Medical Sciences, Beijing, China.
3 Department of Stomatology, Peking Union Medical College Hospital, Peking Union Medical College/Chinese Academy of Medical Science, Beijing, China.
A 36-year-old man with a 4-year history of Crohn disease who was receiving maintenance therapy with infliximab presented with 6 months of progressive left mandibular pain and swelling. What is your diagnosis?