A 30-year-old woman complains of subfebrile body temperature that persists for the last 3 weeks, loss of appetite and working ability, excessive sweating especially at night, malaise. Objectively, her pulmonary percussion indicates no changes in the lungs, auscultation detects crackles in the projection of the upper lobe of the right lung. X-ray shows a dense focus of moderate intensity, 6 mm in diameter, in segment S2. Make the provisional diagnosis: