What will most commonly blunt the costophrenic angle as seen on chest radiograph in an upright individual?
a. Air
b. Bile
c. Excess fluids
d. Liver on the right, intestines on the left
ANS: C
Excess fluids between the visceral and parietal pleura tend to pool here in an upright individual. This causes the angle to appear blunted or flattened to 90 degrees when viewed in the chest ra-diograph.
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