Primary oral tuberculosis: A case series of a rare disease.

Tuberculosis (TB) is still one of the most life-threatening infectious diseases, resulting in high mortality in adults and is commonly found in developing countries. Lung is primarily affected while extrapulmonary TB is rarely encountered. Oral lesions, although rare, can be seen in both primary and secondary stages of TB. Primary oral TB may present a diagnostic challenge as its clinical features can be nonspecific that mimics other diseases and is usually misdiagnosed. Thus, it is very important to be aware and be highly suspicious of oral TB especially in endemic area. We share 4 such cases of primary oral TB with uncommon presentations (two on the gingiva, one on the palate and one on the tongue) The diagnosis was made by histopathological examination, polymerase chain reaction analysis and Mantoux test. They were successfully treated with antituberculous treatment. In secondary TB, the oral manifestations may be accompanied by lesions in the lungs, lymph nodes or in any other part of the body and can be detected by a systemic examination.