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What is What diagnosis is suggested by these spirography findings? and explain in detail?
Answer A. Intrathoracic localized obstructionAn intrathoracic localized obstruction is demonstrated on spirography. The patient underwent flexible fiberoptic bronchoscopy, which revealed nearly complete (greater than 90%) occlusion of the distal trachea by a vascular mass. The patient recovered after endoscopic laser ablation of the mass.