Question

which of the following conditions would demonstrate as the absence of the diaphragm contour and blunting of the costophrenic angle?
emphysema
pleural effusion
pneumothorax
atelectasis

Explanation:

Pleural effusion is characterized by the presence of excess fluid in the pleural space. This fluid can cause the absence of the normal diaphragm contour and blunting of the costophrenic angle on imaging studies. Emphysema mainly affects the air - sacs and lung function, pneumothorax is air in the pleural space without the typical fluid - related changes described, and atelectasis is collapse of lung tissue, not typically associated with these specific contour changes.

Answer:

B. Pleural effusion