What is costophrenic angle?

The costophrenic angle is a sharp angle formed by the intersection of the diaphragm and the rib cage at the bottom of the chest cavity. It is typically seen on chest X-rays and is an important anatomical landmark for radiologists.

The costophrenic angle should normally appear sharp and well-defined on imaging studies. Any abnormalities in this area, such as blunting or rounding of the angle, may indicate the presence of fluid or air in the pleural space. This can be a sign of various conditions such as pneumonia, pleural effusion, or pneumothorax.

Assessment of the costophrenic angle is important in the diagnosis and management of respiratory conditions. Changes in the appearance of the costophrenic angle can help healthcare providers determine the underlying cause of respiratory symptoms and guide treatment decisions.