1 “ Crazy Paving ” appearance on HRCT

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Q. “ Crazy Paving ” appearance on HRCT can be seen in

a. Alveolar Proteinosis

b. Pneumocystis jiroveci pneumonia

c. acute respiratory distress syndrome [ARDS]

d. All of the above.

ANSWER:

Ans: D
Although initially described as typical of alveolar proteinosis, this appearance is nonspecific and may be seen in a variety of
acute lung diseases (e.g., edema, hemorrhage, Pneumocystis jiroveci pneumonia, and acute respiratory distress syndrome [ARDS])
or chronic lung diseases (alveolar proteinosis, exogenous lipoid pneumonia).

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