Specific Oral Manifestations in Adults with Crohn's Disease

Background: Oral manifestations of Crohn's disease (CD) include non-specific lesions and specific lesions directly related to intestinal inflammation. Oral lesions that can be overlooked in CD are sometimes challenging to treat. Methods: In this retrospective single-center study, patients with CD aged over 18 years who complied with follow-up and treatment were included. Clinical definitions of specific oral lesions included pyostomatitis vegetans, glossitis with fissuring, lip swelling with fissuring, cobblestoning, and orofacial granulomatosis. Experienced dentists confirmed the specific lesions in each case. Three groups of patients were identified: those without oral lesions, those with non-specific oral lesions, and those with specific oral lesions. The groups were compared based on demographics, disease extent and behavior (based on the Montreal classification), extraintestinal involvement, biologic and steroid treatment, and the requirement of resective surgery. Results: A total of 96 patients (14.2%) with oral lesions were found among the 676 patients with CD (59.7% male, median age 38 years) who were followed for 6.83 years (IQR 0.5-29.87 years). Eight patients (1.2%, 9 lesions) had specific oral lesions, while eighty-eight patients (13%) had non-specific lesions. Orofacial granulomatosis (n = 3), cobblestoning (n = 2), glossitis with fissuring (n = 2), and lip swelling with fissuring (n = 2) were among the specific lesions. The majority of patients (75%) with specific lesions were male, and their median age was 46.5 years (range: 23-68 years). Disease localization was commonly ileocolonic (50%), and perianal disease was present in 25% of patients. Three patients were active smokers. Extraintestinal manifestations were peripheral arthritis/arthralgia (n = 7) and sacroiliitis (n = 1). All specific lesions were associated with moderate-to-severe disease. Five patients improved with biologic therapy, and two patients with immunomodulatory therapy. Conclusions: Specific oral lesions in CD were associated with active disease and improved with immunomodulators or biologic therapy. Close cooperation between gastroenterologists and dentists is essential for early diagnosis and optimal management of CD.