Air bronchogram is seen in all of the following except: A. Normal lung B. Pulmonary contusion C. Pulmonary hemorrhage D. Pulmonary edema

Understand the Problem

The question is asking about the conditions under which an air bronchogram appears in medical imaging, specifically to identify which option does not exhibit this sign. The options list different lung conditions, and the user is likely looking for understanding related to radiology or pulmonary medicine.

More Information

Air bronchograms indicate alveolar filling processes, visible in lung pathologies like pulmonary edema, contusion, and hemorrhage, but not in a normal lung.

Tips

A common mistake is to assume air bronchograms can appear in healthy lung tissue, which is incorrect.

Sources

• Air bronchogram | Radiology Reference Article | Radiopaedia.org - radiopaedia.org
• Diffuse Air Space Opacities - PMC - pmc.ncbi.nlm.nih.gov