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The coexistence of lung cancer and pulmonary tuberculosis is a relatively rare and can be difficult to diagnose. We present the medical observation of a discovery concomitant of these 2 pathologies. This is a 68-year-old patient, a chronic 30 packet smoker weaned 2 years ago, followed for Parkinson's disease under treatment and presented in a picture of dyspnea associated with productive cough bringing back mucopurulent sputum in a feverish context and whose chest x-ray showed total atelectasis of the left lung. A fibroscopy bronchial examination showed a budding stenosis of the left main bronchus and biopsies of the bud were in favor of adenocarcinoma. A chest CT done as part of the assessment of extension having objectified micronodules in tree bud making suspect a possible pulmonary tuberculosis and which has been confirmed by evidence of AFB in the fluid bronchial aspiration. The patient was put on antibacillary treatment and then referred to the service oncology for oncology treatment. The concomitant association between tuberculosis and neopulmonary disease exists with multiple pathophysiological mechanisms and thus complicates the diagnosis and prognosis.

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