Two cases are hereby presented, diagnosed through clinical, laboratory radiology and histological methods. In each case, the oral involvement was associated with pulmonary tuberculosis. The trauma, particularey in the teeth, is an important deciding factor. Clinically, some ulcerous lesions in mucous membranes and tongue were observed, with definite characteristics such as quite severe pain, difficulty in swallowing and talking. The selected treatment has been chemical therapy. Looking back at hospital files, these two cases have been the only ones observed at Hospital de San Jaun de Dios of Bogotá, in the last fifteen years.