What’s Wrong with this Flow-Volume Loop?

A patient presents with Dyspnea. Spirometry reveals a unique pattern. What does the flow-volume loop suggest, and how is the diagnosis confirmed and treated?

Intrathoracic localized obstruction


What diagnosis is suggested by these spirography findings?

What is the most likely diagnosis?

Intrathoracic localized obstruction
Fixed inspiratory obstruction
Pneumothorax
Restrictive lung disease
Variable extrathoracic obstruction

Bronchoscopy, Flow-volume loop, Intrathoracic localized obstruction, Spirometry, Tracheal obstruction

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