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Three HIV-infected patients with active pulmonary non-disseminated tuberculosis and normal chest radiograph at clinical presentation and during follow-up are reported. Patients had cough and fever but no other specific symptoms. Löwenstein cultures of specimens from bronchoalveolar lavage in two cases and induced sputum in one yielded Mycobacterium tuberculosis.The diagnosis of tuberculosis in HIV-infected patients depends greatly on clinical suspicion by the physician, because of its atypical presentation. Failure to perform appropriate diagnostic tests in HIV-infected patients who present with suspected pulmonary disease will result in underdiagnosis and undertreatment of tuberculosis.