Lung parenchyma may appear hyperlucent in the setting of emphysema, cystic lung disease (acquired or congenital), hyperinflation, or hypoperfusion. Learn a practical approach to organizing and diagnosing this presentation.

• Some of the case images in this talk appear courtesy of Ahmed El-Sherief, MD.

• Suggested CaseStacks.com cases:

• https://www.casestacks.com/chest/chest-ct/nontraumatic/case-8/

• https://www.casestacks.com/chest/chest-ct/nontraumatic/case-17/

• https://www.casestacks.com/chest/chest-ct/practice/case-9/

• https://www.casestacks.com/chest/chest-ct/practice/case-29/

• https://www.casestacks.com/chest/chest-ct/practice/case-33/

• https://www.casestacks.com/chest/chest-ct/practice/case-35/

• https://www.casestacks.com/chest/radiographs/lung/classic-case19/