Systemic Tuberculosis Initially Diagnosed by an Oral Lesion: A Case Report

Oral tuberculosis is rare. A 34-year-old Haaka man admitted for treatment of an anal fistula was not aware he had systemic tuberculosis. The detection of an oral tuberculous lesion histologically led to the identification of systemic disease, and the bacteria was further confirmed by PCR (Polymerase Chain Reaction ) assay as Mycobacteria tuberculosis. Through the cautious differential diagnosis of oral lesions, the dentist can play a role in the early detection of tuberculosis and reduce the risk of exposure. (Tzu Chi Med J 2000; 12:67-71)