An Air-Fluid Level in the Posterior Mediastinum on a Plain

question 22

Multiple Choice

An air-fluid level in the posterior mediastinum on a plain film chest radiograph most likely represents __________.

• A) sliding hiatal hernia
• B) paraesophageal hernia
• C) abscess
• D) cavitated lung neoplasm

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System of Roads

An interconnected set of paths or routes designed for the transportation of goods, people, and services across areas.

American Identity

The sense of a collective character, traditions, and beliefs shared by citizens of the United States.

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Urban Population

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