Tuberculosis of the oral cavity.

Tuberculosis (TB) of the tongue is not a common finding diagnosis, even if consider endemic areas. Tuberculosis of the tongue sometimes can mimic lingual neoplasm. Oral tuberculosis is rarely primary as mechanism, and frequently secondary to pulmonary tuberculosis. There are many suspect lesions that can be classified as tuberculosis, such as tumor mass, ulcerative lesion or fissure. It is very important for diagnosis to perform histopathological examination of the biopsy. We present here the case of a 74-year-old man who developed lingual tuberculosis with a tumor aspect concomitant with pulmonary tuberculosis. Histopathological and immunohistochemical examinations established the diagnosis of lingual tuberculosis.