Isolated Rectal Tuberculosis in Immunocompetent Host.

Abdominal tuberculosis (TB) is the sixth most common site for extrapulmonary TB. Ileocecal region is the most common site for it, and its incidence reduces as we move proximally and distally from it. Isolated rectal TB in an immunocompetent person is very rare, and it usually mimics as rectal carcinoma. The yield of endoscopic biopsies for granuloma is low due to submucosal location of these lesions, and mostly, they are diagnosed after surgical intervention. We report a case of isolated rectal TB in a middle-aged female who present with chronic diarrhea and was diagnosed by the presence of epithelioid cells forming granulomas and acid-fast bacilli in rectal biopsy.