Final answer:
Pleural effusion is the condition associated with sparing of costophrenic angles. It is the accumulation of fluid in the pleural space. This can occur due to various reasons.
Step-by-step explanation:
Sparing of costophrenic angles is a buzzword for pleural effusion. Pleural effusion is the accumulation of fluid in the pleural space, which is the space between the two layers of the pleura surrounding the lungs. This can occur due to various reasons such as infection, inflammation, heart failure, or malignancy. The presence of pleural effusion can be detected on imaging studies like chest X-ray, where the costophrenic angles the lowermost corners of the lungs are typically spared.