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• Trachea pulled toward the opacified side

• pneumonectomy
• total lung collapse: e.g. endobronchial intubation
• pulmonary agenesis
• pulmonary hypoplasia

• Trachea remains central in position

• consolidation
• pulmonary oedema/ARDS
• pleural mass: e.g. mesothelioma
• chest wall mass: e.g. Askin/Ewing sarcoma

• Pushed away from the opacified side

• pleural effusion
• diaphragmatic hernia
• large pulmonary mass
• diaphragmatic ruptur

Pneumonia

But where?

A: Minor Fissure

B: Major Fissure

A: Minor Fissure

B: Major Fissure

Diaphragmatic Hernia

CORRECT NG PLACEMENT

INCORRECT NG PLACEMENT

Hydropneumothorax

Left Atrial Enlargment

Bonus Points: 75M Chest Pain 

Bonus Points: 75M Chest Pain