We have presented a case of BMG with concomitant fissured tongue, a not uncommon association for two rather common oral diseases. BMG is relatively simple to recognize, and the diagnosis most commonly is based on clinical appearance and history of the presence of the lesions. Clinicians should be aware, however, of the similarity, clinically and histologically, of lesions of BMG with other, more serious diseases such as psoriasis and Reiter's syndrome. Patients with characteristic lesions of BMG should be evaluated closely for signs and symptoms of these other diseases.