Aphthous ulcers and vitamin B12 deficiency

Aphthous ulcers of the oral cavity are frequently encountered in general pr actice. Although the exact pathophysiology remains obscure, many factors ca n contribute to the pathogenesis of these lesions, such as immunological fa ctors, local trauma, smoking, stress, hormonal state, family history, food hypersensitivity,and infection. We describe three patients in whom a clear relationship appeared to exist between recurrent aphthous ulcers and a defi ciency of vitamin B12. Tt is concluded that in all patients with recurrent aphthous ulceration, deficiency of vitamin B12 should be considered. (C) 19 98 Elsevier Science B.V. All rights reserved.