eng Science and Education Publishing American Journal of Infectious Diseases and Microbiology 2328-4064 2014-06-11 2 3 45 47 10.12691/ajidm-2-3-1 AJIDM2014231 article Mehdi Nasr Isfahani 1 Parichehr Ghalayani 2 Fahimeh Pakravan Pakravanfahimeh@yahoo.com 2 Department of emergency medicine, Isfahan university of medical sciences, Isfahan, Iran Department of oral medicine, Isfahan university of medical sciences, Isfahan, Iran We report a rare case of tuberculosis of oral cavity in a 3.5 year-old male who was referred to oral medicine department with a chief complaint of a painless lesion in the oral cavity. Incisional biopsy from the lesion margin depicted histological features of necrotizing granulomatous lesion. Ziehl-Neelsen staining for acid fast bacilli, interestingly, was negative. http://pubs.sciepub.com/ajidm/2/3/1/ajidm-2-3-1.pdf oral tuberculosis Ziehl-Neelsen Acid-fast bacilli