Abstract

A 21-year-old male patient was hospitalized due to complaints of dyspnea, and occasional cough and night sweats. Hehad smoking history. Chest X-ray revealed reticulonodular infiltration in both lung fields. Thorax high resolution computerized tomography (HRCT) revealed a reticulonodular infiltration and thin walled cavitary lesions. He underwent a video-assisted thoracic surgery for definite diagnosis. The biopsy specimen showed S-100 protein positive histiocytes in lesions. During laboratory evaluation M. tuberculosis was isolated on culture media (BACTEC) and antituberculosis treatment was started. HRCT examination after six months from the beginning of the treatment revealed marked improvement in nodular lesions and thin walled cystic lesions.