[A case of isolated tuberculosis of the appendix at the University Hospital Center in Brazzaville, Congo].

Since the outbreak of human immunodeficiency virus (HIV) infection, extrapulmonary tuberculosis has become increasingly frequent in developing countries. The purpose of this report is to describe a case of isolated tuberculosis of the appendix diagnosed following generalized peritonitis in a 53-year-old man. The appendix is the least frequent gastrointestinal location of isolated tuberculosis. Diagnosis was achieved by histopathological examination of the appendix immersed in formalin 10% after appendectomy. Paraffin-embedded histological sections stained with hematoxylin-eosin (HE) displayed caseofollicular lesions characteristic of infection by Koch bacillus. Outcome was favourable with a 9-month regimen of antituberculosis treatment according to the protocol of the World Health Organization (WHO).