[Primary colon tuberculosis].

Two cases of primary gastrointestinal tuberculosis are reported. One patient showed radiologic, colonoscopic and histopathologic features of Crohn's disease. After a five-year follow-up, acid-fast bacilli were identified in colonic tissue cultures. In both patients fecal cultures were repeatedly negative for Mycobacterium tuberculosis. The two patients were successfully treated with antituberculous therapy. The authors emphasize the importance of considering tuberculosis in patients presenting with Crohn's disease. In this regard colonoscopy with tissue culture of targeted biopsy may be a valuable aid in establishing the diagnosis of tuberculous colitis.