Correct!
2. Lipoid pneumonia

Of the choices listed only lipoid pneumonia has a density other than water. In this case the radiologist confirmed that the lesions showed low attenuation of ~ -100 Hounsfield units reflecting fat content.

Which of the following is true regarding lipoid pneumonia?

1. Aspiration of mineral oil tends to cause minimal lung inflammation
2. Most patients are elderly and asymptomatic
3. Radiologic manifestations can be variable
4. 1 and 3
5. All of the above

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