Primary oral tuberculosis.

Persistent oral ulcers and erosions can be the final common manifestation, sometimes clinically distinguishable, of a diverse spectrum of conditions ranging from traumatic lesions, infectious diseases, systemic and local immune-mediated lesions up to neoplasms. A case with oral tuberculosis and absence of any systemic manifestations is reported. The location and clinical presentation of the lesion is unusual and underlines the importance of considering tuberculosis in the differential diagnosis of oral lesions that affect the mucosa and the gingiva.