Tuberculosis (TB) is a common infectious disease worldwide. It can affect many organs, the most common is lungs infection. Upper respiratory tract involvement is uncommon and the least common regional involvement is nasopharyngeal region. The authors report a case of nasopharyngeal tuberculosis who came
with diplopia which is a very rare presentation. Nasopharyngeal tuberculosis is a rare condition that is found in only reported cases in the literature. In Thailand, the present case is the second case of this condition with diplopia. Nasopharyngeal examination reveal mass or ulceration. The diagnostic tool is lesional biopsy. Histology is necessary to diagnose tuberculosis and to exclude other conditions especially nasopharyngeal cancer. Nasopharyngeal tuberculosis has a good prognosis after treatment.

Keywords: Nasopharynx, tuberculosis, nasopharyngeal tuberculosis, diplopia, carvernous sinus